From a0617bff0de3a4de70cc15123d0d6ffd6047f98f Mon Sep 17 00:00:00 2001
From: Ting-Yu Lin <tlin@mozilla.com>
Date: Fri, 2 Jun 2023 02:26:03 +0200
Subject: [PATCH] style: Run rustfmt on servo/components/style and
 servo/ports/geckolib

This patch is generated by running `cargo +nightly fmt` under
`servo/components/style/` and `servo/ports/geckolib` against mozilla-central
https://hg.mozilla.org/mozilla-central/rev/b193f2e7a6a5d1f042c957ea4acd5c89bf210512

My nightly version is: 1.58.0-nightly (c9c4b5d72 2021-11-17)

Manually remove the redundant braces in author_styles.rs to fix a warning.

Differential Revision: https://phabricator.services.mozilla.com/D131556
---
 components/style/applicable_declarations.rs   |  2 +-
 components/style/author_styles.rs             | 13 +--
 components/style/counter_style/mod.rs         | 12 +--
 components/style/custom_properties.rs         | 13 +--
 components/style/data.rs                      | 11 ++-
 components/style/error_reporting.rs           |  2 +-
 components/style/gecko/media_features.rs      | 48 +++++++--
 components/style/gecko/media_queries.rs       | 18 ++--
 components/style/gecko/selector_parser.rs     | 15 +--
 components/style/gecko/wrapper.rs             | 17 ++--
 .../media_queries/media_feature_expression.rs | 16 +--
 components/style/rule_collector.rs            | 33 +++++--
 components/style/selector_map.rs              | 39 +++++---
 components/style/selector_parser.rs           |  3 +-
 components/style/shared_lock.rs               | 10 +-
 components/style/style_adjuster.rs            | 46 +++++++--
 components/style/stylesheets/import_rule.rs   |  3 +-
 components/style/stylesheets/loader.rs        |  2 +-
 components/style/stylesheets/mod.rs           |  4 +-
 components/style/stylesheets/rule_parser.rs   | 23 ++---
 .../style/stylesheets/rules_iterator.rs       |  5 +-
 components/style/stylesheets/stylesheet.rs    |  8 +-
 components/style/stylist.rs                   | 97 +++++++++----------
 components/style/values/animated/transform.rs |  9 +-
 components/style/values/computed/color.rs     |  2 +-
 components/style/values/computed/font.rs      | 60 ++++++------
 components/style/values/computed/image.rs     |  1 -
 components/style/values/computed/length.rs    |  6 +-
 components/style/values/computed/mod.rs       |  2 +-
 components/style/values/computed/text.rs      |  4 +-
 components/style/values/computed/transform.rs |  2 +-
 components/style/values/generics/counters.rs  | 12 +--
 components/style/values/generics/image.rs     |  7 +-
 components/style/values/generics/mod.rs       |  2 +-
 components/style/values/generics/transform.rs |  2 +-
 components/style/values/generics/ui.rs        | 10 +-
 components/style/values/mod.rs                |  4 +-
 components/style/values/resolved/color.rs     |  4 +-
 components/style/values/resolved/counters.rs  | 17 ++--
 components/style/values/specified/box.rs      | 10 +-
 components/style/values/specified/calc.rs     | 36 ++++---
 components/style/values/specified/color.rs    | 10 +-
 components/style/values/specified/counters.rs | 50 +++++++---
 components/style/values/specified/font.rs     | 46 +++++----
 components/style/values/specified/gecko.rs    |  4 +-
 components/style/values/specified/image.rs    | 39 ++++++--
 components/style/values/specified/mod.rs      |  6 +-
 components/style/values/specified/svg_path.rs | 18 ++--
 components/style/values/specified/text.rs     | 19 ++--
 components/style/values/specified/ui.rs       |  4 +-
 50 files changed, 486 insertions(+), 340 deletions(-)

diff --git a/components/style/applicable_declarations.rs b/components/style/applicable_declarations.rs
index db0f7fce99f..7f2d3928d2d 100644
--- a/components/style/applicable_declarations.rs
+++ b/components/style/applicable_declarations.rs
@@ -6,8 +6,8 @@
 
 use crate::properties::PropertyDeclarationBlock;
 use crate::rule_tree::{CascadeLevel, StyleSource};
-use crate::stylesheets::layer_rule::LayerOrder;
 use crate::shared_lock::Locked;
+use crate::stylesheets::layer_rule::LayerOrder;
 use servo_arc::Arc;
 use smallvec::SmallVec;
 
diff --git a/components/style/author_styles.rs b/components/style/author_styles.rs
index dfd33711ed2..83bd0ad2854 100644
--- a/components/style/author_styles.rs
+++ b/components/style/author_styles.rs
@@ -10,10 +10,10 @@ use crate::dom::TElement;
 use crate::gecko_bindings::sugar::ownership::{HasBoxFFI, HasFFI, HasSimpleFFI};
 use crate::invalidation::media_queries::ToMediaListKey;
 use crate::shared_lock::SharedRwLockReadGuard;
-use crate::stylist::Stylist;
 use crate::stylesheet_set::AuthorStylesheetSet;
 use crate::stylesheets::StylesheetInDocument;
 use crate::stylist::CascadeData;
+use crate::stylist::Stylist;
 use servo_arc::Arc;
 
 /// A set of author stylesheets and their computed representation, such as the
@@ -32,9 +32,7 @@ where
 }
 
 lazy_static! {
-    static ref EMPTY_CASCADE_DATA: Arc<CascadeData> = {
-        Arc::new_leaked(CascadeData::new())
-    };
+    static ref EMPTY_CASCADE_DATA: Arc<CascadeData> = Arc::new_leaked(CascadeData::new());
 }
 
 impl<S> AuthorStyles<S>
@@ -55,11 +53,8 @@ where
     /// TODO(emilio): Need a host element and a snapshot map to do invalidation
     /// properly.
     #[inline]
-    pub fn flush<E>(
-        &mut self,
-        stylist: &mut Stylist,
-        guard: &SharedRwLockReadGuard,
-    ) where
+    pub fn flush<E>(&mut self, stylist: &mut Stylist, guard: &SharedRwLockReadGuard)
+    where
         E: TElement,
         S: ToMediaListKey,
     {
diff --git a/components/style/counter_style/mod.rs b/components/style/counter_style/mod.rs
index e470e53ae1f..daad5145e1c 100644
--- a/components/style/counter_style/mod.rs
+++ b/components/style/counter_style/mod.rs
@@ -55,12 +55,12 @@ pub fn parse_counter_style_name<'i, 't>(
 }
 
 fn is_valid_name_definition(ident: &CustomIdent) -> bool {
-    ident.0 != atom!("decimal")
-        && ident.0 != atom!("disc")
-        && ident.0 != atom!("circle")
-        && ident.0 != atom!("square")
-        && ident.0 != atom!("disclosure-closed")
-        && ident.0 != atom!("disclosure-open")
+    ident.0 != atom!("decimal") &&
+        ident.0 != atom!("disc") &&
+        ident.0 != atom!("circle") &&
+        ident.0 != atom!("square") &&
+        ident.0 != atom!("disclosure-closed") &&
+        ident.0 != atom!("disclosure-open")
 }
 
 /// Parse the prelude of an @counter-style rule
diff --git a/components/style/custom_properties.rs b/components/style/custom_properties.rs
index 641a421bd5c..931bf32a00c 100644
--- a/components/style/custom_properties.rs
+++ b/components/style/custom_properties.rs
@@ -93,7 +93,9 @@ impl CssEnvironment {
         if !device.is_chrome_document() {
             return None;
         }
-        let var = CHROME_ENVIRONMENT_VARIABLES.iter().find(|var| var.name == *name)?;
+        let var = CHROME_ENVIRONMENT_VARIABLES
+            .iter()
+            .find(|var| var.name == *name)?;
         Some((var.evaluator)(device))
     }
 }
@@ -682,10 +684,7 @@ impl<'a> CustomPropertiesBuilder<'a> {
 /// (meaning we should use the inherited value).
 ///
 /// It does cycle dependencies removal at the same time as substitution.
-fn substitute_all(
-    custom_properties_map: &mut CustomPropertiesMap,
-    device: &Device,
-) {
+fn substitute_all(custom_properties_map: &mut CustomPropertiesMap, device: &Device) {
     // The cycle dependencies removal in this function is a variant
     // of Tarjan's algorithm. It is mostly based on the pseudo-code
     // listed in
@@ -999,7 +998,9 @@ fn substitute_block<'i>(
                         let first_token_type = input
                             .next_including_whitespace_and_comments()
                             .ok()
-                            .map_or_else(TokenSerializationType::nothing, |t| t.serialization_type());
+                            .map_or_else(TokenSerializationType::nothing, |t| {
+                                t.serialization_type()
+                            });
                         input.reset(&after_comma);
                         let mut position = (after_comma.position(), first_token_type);
                         last_token_type = substitute_block(
diff --git a/components/style/data.rs b/components/style/data.rs
index f486b24dc58..758adf57a68 100644
--- a/components/style/data.rs
+++ b/components/style/data.rs
@@ -179,13 +179,20 @@ impl ElementStyles {
     pub fn uses_viewport_units(&self) -> bool {
         use crate::computed_value_flags::ComputedValueFlags;
 
-        if self.primary().flags.intersects(ComputedValueFlags::USES_VIEWPORT_UNITS) {
+        if self
+            .primary()
+            .flags
+            .intersects(ComputedValueFlags::USES_VIEWPORT_UNITS)
+        {
             return true;
         }
 
         for pseudo_style in self.pseudos.as_array() {
             if let Some(ref pseudo_style) = pseudo_style {
-                if pseudo_style.flags.intersects(ComputedValueFlags::USES_VIEWPORT_UNITS) {
+                if pseudo_style
+                    .flags
+                    .intersects(ComputedValueFlags::USES_VIEWPORT_UNITS)
+                {
                     return true;
                 }
             }
diff --git a/components/style/error_reporting.rs b/components/style/error_reporting.rs
index eebb0901309..752f68b5bdc 100644
--- a/components/style/error_reporting.rs
+++ b/components/style/error_reporting.rs
@@ -214,7 +214,7 @@ impl<'a> fmt::Display for ContextualParseError<'a> {
             ContextualParseError::UnsupportedValue(_value, ref err) => parse_error_to_str(err, f),
             ContextualParseError::NeverMatchingHostSelector(ref selector) => {
                 write!(f, ":host selector is not featureless: {}", selector)
-            }
+            },
         }
     }
 }
diff --git a/components/style/gecko/media_features.rs b/components/style/gecko/media_features.rs
index 40a34095d6f..d314500b88f 100644
--- a/components/style/gecko/media_features.rs
+++ b/components/style/gecko/media_features.rs
@@ -556,7 +556,8 @@ fn eval_moz_windows_non_native_menus(
     query_value: Option<bool>,
     _: Option<RangeOrOperator>,
 ) -> bool {
-    let use_non_native_menus = match static_prefs::pref!("browser.display.windows.non_native_menus") {
+    let use_non_native_menus = match static_prefs::pref!("browser.display.windows.non_native_menus")
+    {
         0 => false,
         1 => true,
         _ => {
@@ -873,18 +874,39 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 58] = [
         Evaluator::BoolInteger(eval_moz_overlay_scrollbars),
         ParsingRequirements::CHROME_AND_UA_ONLY,
     ),
-
-    lnf_int_feature!(atom!("-moz-scrollbar-start-backward"), ScrollArrowStyle, get_scrollbar_start_backward),
-    lnf_int_feature!(atom!("-moz-scrollbar-start-forward"), ScrollArrowStyle, get_scrollbar_start_forward),
-    lnf_int_feature!(atom!("-moz-scrollbar-end-backward"), ScrollArrowStyle, get_scrollbar_end_backward),
-    lnf_int_feature!(atom!("-moz-scrollbar-end-forward"), ScrollArrowStyle, get_scrollbar_end_forward),
-    lnf_int_feature!(atom!("-moz-scrollbar-thumb-proportional"), ScrollSliderStyle),
+    lnf_int_feature!(
+        atom!("-moz-scrollbar-start-backward"),
+        ScrollArrowStyle,
+        get_scrollbar_start_backward
+    ),
+    lnf_int_feature!(
+        atom!("-moz-scrollbar-start-forward"),
+        ScrollArrowStyle,
+        get_scrollbar_start_forward
+    ),
+    lnf_int_feature!(
+        atom!("-moz-scrollbar-end-backward"),
+        ScrollArrowStyle,
+        get_scrollbar_end_backward
+    ),
+    lnf_int_feature!(
+        atom!("-moz-scrollbar-end-forward"),
+        ScrollArrowStyle,
+        get_scrollbar_end_forward
+    ),
+    lnf_int_feature!(
+        atom!("-moz-scrollbar-thumb-proportional"),
+        ScrollSliderStyle
+    ),
     lnf_int_feature!(atom!("-moz-menubar-drag"), MenuBarDrag),
     lnf_int_feature!(atom!("-moz-windows-default-theme"), WindowsDefaultTheme),
     lnf_int_feature!(atom!("-moz-mac-graphite-theme"), MacGraphiteTheme),
     lnf_int_feature!(atom!("-moz-mac-big-sur-theme"), MacBigSurTheme),
     lnf_int_feature!(atom!("-moz-mac-rtl"), MacRTL),
-    lnf_int_feature!(atom!("-moz-windows-accent-color-in-titlebar"), WindowsAccentColorInTitlebar),
+    lnf_int_feature!(
+        atom!("-moz-windows-accent-color-in-titlebar"),
+        WindowsAccentColorInTitlebar
+    ),
     lnf_int_feature!(atom!("-moz-windows-compositor"), DWMCompositor),
     lnf_int_feature!(atom!("-moz-windows-classic"), WindowsClassic),
     lnf_int_feature!(atom!("-moz-windows-glass"), WindowsGlass),
@@ -893,8 +915,14 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 58] = [
     lnf_int_feature!(atom!("-moz-gtk-csd-minimize-button"), GTKCSDMinimizeButton),
     lnf_int_feature!(atom!("-moz-gtk-csd-maximize-button"), GTKCSDMaximizeButton),
     lnf_int_feature!(atom!("-moz-gtk-csd-close-button"), GTKCSDCloseButton),
-    lnf_int_feature!(atom!("-moz-gtk-csd-reversed-placement"), GTKCSDReversedPlacement),
+    lnf_int_feature!(
+        atom!("-moz-gtk-csd-reversed-placement"),
+        GTKCSDReversedPlacement
+    ),
     lnf_int_feature!(atom!("-moz-system-dark-theme"), SystemUsesDarkTheme),
     bool_pref_feature!(atom!("-moz-proton"), "browser.proton.enabled"),
-    bool_pref_feature!(atom!("-moz-proton-places-tooltip"), "browser.proton.places-tooltip.enabled"),
+    bool_pref_feature!(
+        atom!("-moz-proton-places-tooltip"),
+        "browser.proton.places-tooltip.enabled"
+    ),
 ];
diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index 9c10c69609d..19ed6444f07 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -14,7 +14,7 @@ use crate::media_queries::MediaType;
 use crate::properties::ComputedValues;
 use crate::string_cache::Atom;
 use crate::values::computed::font::GenericFontFamily;
-use crate::values::computed::{Length, ColorScheme};
+use crate::values::computed::{ColorScheme, Length};
 use crate::values::specified::color::SystemColor;
 use crate::values::specified::font::FONT_MEDIUM_PX;
 use crate::values::{CustomIdent, KeyframesName};
@@ -389,10 +389,12 @@ impl Device {
     }
 
     /// Computes a system color and returns it as an nscolor.
-    pub(crate) fn system_nscolor(&self, system_color: SystemColor, color_scheme: &ColorScheme) -> u32 {
-        unsafe {
-            bindings::Gecko_ComputeSystemColor(system_color, self.document(), color_scheme)
-        }
+    pub(crate) fn system_nscolor(
+        &self,
+        system_color: SystemColor,
+        color_scheme: &ColorScheme,
+    ) -> u32 {
+        unsafe { bindings::Gecko_ComputeSystemColor(system_color, self.document(), color_scheme) }
     }
 
     /// Returns the default background color.
@@ -460,14 +462,16 @@ impl Device {
     /// Returns the gtk titlebar radius in CSS pixels.
     pub fn titlebar_radius(&self) -> f32 {
         unsafe {
-            bindings::Gecko_GetLookAndFeelInt(bindings::LookAndFeel_IntID::TitlebarRadius as i32) as f32
+            bindings::Gecko_GetLookAndFeelInt(bindings::LookAndFeel_IntID::TitlebarRadius as i32)
+                as f32
         }
     }
 
     /// Returns the gtk menu radius in CSS pixels.
     pub fn menu_radius(&self) -> f32 {
         unsafe {
-            bindings::Gecko_GetLookAndFeelInt(bindings::LookAndFeel_IntID::GtkMenuRadius as i32) as f32
+            bindings::Gecko_GetLookAndFeelInt(bindings::LookAndFeel_IntID::GtkMenuRadius as i32)
+                as f32
         }
     }
 
diff --git a/components/style/gecko/selector_parser.rs b/components/style/gecko/selector_parser.rs
index 47b2ce5e412..35c5a5c454d 100644
--- a/components/style/gecko/selector_parser.rs
+++ b/components/style/gecko/selector_parser.rs
@@ -139,7 +139,10 @@ impl NonTSPseudoClass {
     /// Returns whether the pseudo-class is enabled in content sheets.
     #[inline]
     fn is_enabled_in_content(&self) -> bool {
-        if matches!(*self, Self::MozLWTheme | Self::MozLWThemeBrightText | Self::MozLWThemeDarkText) {
+        if matches!(
+            *self,
+            Self::MozLWTheme | Self::MozLWThemeBrightText | Self::MozLWThemeDarkText
+        ) {
             return static_prefs::pref!("layout.css.moz-lwtheme.content.enabled");
         }
         if let NonTSPseudoClass::MozLocaleDir(..) = *self {
@@ -174,12 +177,10 @@ impl NonTSPseudoClass {
     /// Get the document state flag associated with a pseudo-class, if any.
     pub fn document_state_flag(&self) -> DocumentState {
         match *self {
-            NonTSPseudoClass::MozLocaleDir(ref dir) => {
-                match dir.as_horizontal_direction() {
-                    Some(HorizontalDirection::Ltr) => DocumentState::LTR_LOCALE,
-                    Some(HorizontalDirection::Rtl) => DocumentState::RTL_LOCALE,
-                    None => DocumentState::empty(),
-                }
+            NonTSPseudoClass::MozLocaleDir(ref dir) => match dir.as_horizontal_direction() {
+                Some(HorizontalDirection::Ltr) => DocumentState::LTR_LOCALE,
+                Some(HorizontalDirection::Rtl) => DocumentState::RTL_LOCALE,
+                None => DocumentState::empty(),
             },
             NonTSPseudoClass::MozWindowInactive => DocumentState::WINDOW_INACTIVE,
             NonTSPseudoClass::MozLWTheme => DocumentState::LWTHEME,
diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index e9c67eac554..c41d2ff1e85 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -27,6 +27,7 @@ use crate::gecko_bindings::bindings;
 use crate::gecko_bindings::bindings::Gecko_ElementHasAnimations;
 use crate::gecko_bindings::bindings::Gecko_ElementHasCSSAnimations;
 use crate::gecko_bindings::bindings::Gecko_ElementHasCSSTransitions;
+use crate::gecko_bindings::bindings::Gecko_ElementState;
 use crate::gecko_bindings::bindings::Gecko_GetActiveLinkAttrDeclarationBlock;
 use crate::gecko_bindings::bindings::Gecko_GetAnimationEffectCount;
 use crate::gecko_bindings::bindings::Gecko_GetAnimationRule;
@@ -39,7 +40,6 @@ use crate::gecko_bindings::bindings::Gecko_IsSignificantChild;
 use crate::gecko_bindings::bindings::Gecko_MatchLang;
 use crate::gecko_bindings::bindings::Gecko_UnsetDirtyStyleAttr;
 use crate::gecko_bindings::bindings::Gecko_UpdateAnimations;
-use crate::gecko_bindings::bindings::Gecko_ElementState;
 use crate::gecko_bindings::bindings::{Gecko_SetNodeFlags, Gecko_UnsetNodeFlags};
 use crate::gecko_bindings::structs;
 use crate::gecko_bindings::structs::nsChangeHint;
@@ -1196,7 +1196,11 @@ impl<'le> TElement for GeckoElement<'le> {
     where
         F: FnMut(&AtomIdent),
     {
-        for attr in self.non_mapped_attrs().iter().chain(self.mapped_attrs().iter()) {
+        for attr in self
+            .non_mapped_attrs()
+            .iter()
+            .chain(self.mapped_attrs().iter())
+        {
             let is_nodeinfo = attr.mName.mBits & 1 != 0;
             unsafe {
                 let atom = if is_nodeinfo {
@@ -1972,9 +1976,7 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
             NonTSPseudoClass::Active |
             NonTSPseudoClass::Hover |
             NonTSPseudoClass::MozAutofillPreview |
-            NonTSPseudoClass::Dir(..) => {
-                self.state().intersects(pseudo_class.state_flag())
-            },
+            NonTSPseudoClass::Dir(..) => self.state().intersects(pseudo_class.state_flag()),
             NonTSPseudoClass::AnyLink => self.is_link(),
             NonTSPseudoClass::Link => {
                 self.is_link() && context.visited_handling().matches_unvisited()
@@ -2033,7 +2035,10 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
             NonTSPseudoClass::MozWindowInactive => {
                 let state_bit = pseudo_class.document_state_flag();
                 if state_bit.is_empty() {
-                    debug_assert!(matches!(pseudo_class, NonTSPseudoClass::MozLocaleDir(..)), "Only moz-locale-dir should ever return an empty state");
+                    debug_assert!(
+                        matches!(pseudo_class, NonTSPseudoClass::MozLocaleDir(..)),
+                        "Only moz-locale-dir should ever return an empty state"
+                    );
                     return false;
                 }
                 if context.extra_data.document_state.intersects(state_bit) {
diff --git a/components/style/media_queries/media_feature_expression.rs b/components/style/media_queries/media_feature_expression.rs
index 1658439da21..80827af401c 100644
--- a/components/style/media_queries/media_feature_expression.rs
+++ b/components/style/media_queries/media_feature_expression.rs
@@ -211,13 +211,15 @@ fn consume_operation_or_colon(input: &mut Parser) -> Result<Option<Operator>, ()
     //
     // TODO(emilio): Maybe we should ignore comments as well?
     // https://github.com/w3c/csswg-drafts/issues/6248
-    let parsed_equal = input.try_parse(|i| {
-        let t = i.next_including_whitespace().map_err(|_| ())?;
-        if !matches!(t, Token::Delim('=')) {
-            return Err(())
-        }
-        Ok(())
-    }).is_ok();
+    let parsed_equal = input
+        .try_parse(|i| {
+            let t = i.next_including_whitespace().map_err(|_| ())?;
+            if !matches!(t, Token::Delim('=')) {
+                return Err(());
+            }
+            Ok(())
+        })
+        .is_ok();
 
     if !parsed_equal {
         return Ok(Some(operator));
diff --git a/components/style/rule_collector.rs b/components/style/rule_collector.rs
index 65f55ea887a..021c0176416 100644
--- a/components/style/rule_collector.rs
+++ b/components/style/rule_collector.rs
@@ -147,8 +147,9 @@ where
         self.context.current_host = host.map(|e| e.opaque());
         f(self);
         if start != self.rules.len() {
-            self.rules[start..]
-                .sort_unstable_by_key(|block| (block.layer_order, block.specificity, block.source_order()));
+            self.rules[start..].sort_unstable_by_key(|block| {
+                (block.layer_order, block.specificity, block.source_order())
+            });
         }
         self.context.current_host = old_host;
         self.in_sort_scope = false;
@@ -214,7 +215,12 @@ where
     }
 
     #[inline]
-    fn collect_rules_in_list(&mut self, part_rules: &[Rule], cascade_level: CascadeLevel, cascade_data: &CascadeData) {
+    fn collect_rules_in_list(
+        &mut self,
+        part_rules: &[Rule],
+        cascade_level: CascadeLevel,
+        cascade_data: &CascadeData,
+    ) {
         debug_assert!(self.in_sort_scope, "Rules gotta be sorted");
         SelectorMap::get_matching_rules(
             self.element,
@@ -228,7 +234,12 @@ where
     }
 
     #[inline]
-    fn collect_rules_in_map(&mut self, map: &SelectorMap<Rule>, cascade_level: CascadeLevel, cascade_data: &CascadeData) {
+    fn collect_rules_in_map(
+        &mut self,
+        map: &SelectorMap<Rule>,
+        cascade_level: CascadeLevel,
+        cascade_data: &CascadeData,
+    ) {
         debug_assert!(self.in_sort_scope, "Rules gotta be sorted");
         map.get_all_matching_rules(
             self.element,
@@ -390,10 +401,10 @@ where
             let outer_shadow = inner_shadow_host.containing_shadow();
             let cascade_data = match outer_shadow {
                 Some(shadow) => shadow.style_data(),
-                None => Some(self
-                    .stylist
-                    .cascade_data()
-                    .borrow_for_origin(Origin::Author)
+                None => Some(
+                    self.stylist
+                        .cascade_data()
+                        .borrow_for_origin(Origin::Author),
                 ),
             };
 
@@ -406,7 +417,11 @@ where
                     self.in_tree(containing_host, |collector| {
                         for p in &parts {
                             if let Some(part_rules) = part_rules.get(&p.0) {
-                                collector.collect_rules_in_list(part_rules, cascade_level, cascade_data);
+                                collector.collect_rules_in_list(
+                                    part_rules,
+                                    cascade_level,
+                                    cascade_data,
+                                );
                             }
                         }
                     });
diff --git a/components/style/selector_map.rs b/components/style/selector_map.rs
index a2b5d6bb6b6..ff7e93ae9c0 100644
--- a/components/style/selector_map.rs
+++ b/components/style/selector_map.rs
@@ -12,7 +12,7 @@ use crate::hash::map as hash_map;
 use crate::hash::{HashMap, HashSet};
 use crate::rule_tree::CascadeLevel;
 use crate::selector_parser::SelectorImpl;
-use crate::stylist::{Rule, CascadeData};
+use crate::stylist::{CascadeData, Rule};
 use crate::{Atom, LocalName, Namespace, WeakAtom};
 use fallible::FallibleVec;
 use hashglobe::FailedAllocationError;
@@ -313,7 +313,8 @@ impl SelectorMap<Rule> {
                 context,
                 flags_setter,
             ) {
-                matching_rules.push(rule.to_applicable_declaration_block(cascade_level, cascade_data));
+                matching_rules
+                    .push(rule.to_applicable_declaration_block(cascade_level, cascade_data));
             }
         }
     }
@@ -366,14 +367,11 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
                             &mut self.local_name_hash
                         };
                         if name != lower_name {
-                            hash
-                                .try_entry(lower_name.clone())?
+                            hash.try_entry(lower_name.clone())?
                                 .or_insert_with(SmallVec::new)
                                 .try_push($entry.clone())?;
                         }
-                        hash
-                            .try_entry(name.clone())?
-                            .or_insert_with(SmallVec::new)
+                        hash.try_entry(name.clone())?.or_insert_with(SmallVec::new)
                     },
                     Bucket::Namespace(url) => self
                         .namespace_hash
@@ -387,7 +385,11 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
 
         let bucket = {
             let mut disjoint_buckets = SmallVec::new();
-            let bucket = find_bucket(entry.selector(), &mut disjoint_buckets, self.bucket_attributes);
+            let bucket = find_bucket(
+                entry.selector(),
+                &mut disjoint_buckets,
+                self.bucket_attributes,
+            );
 
             // See if inserting this selector in multiple entries in the
             // selector map would be worth it. Consider a case like:
@@ -619,11 +621,16 @@ fn specific_bucket_for<'a>(
         Component::Root => Bucket::Root,
         Component::ID(ref id) => Bucket::ID(id),
         Component::Class(ref class) => Bucket::Class(class),
-        Component::AttributeInNoNamespace { ref local_name, .. } if bucket_attributes => Bucket::Attribute {
-            name: local_name,
-            lower_name: local_name,
+        Component::AttributeInNoNamespace { ref local_name, .. } if bucket_attributes => {
+            Bucket::Attribute {
+                name: local_name,
+                lower_name: local_name,
+            }
         },
-        Component::AttributeInNoNamespaceExists { ref local_name, ref local_name_lower } if bucket_attributes => Bucket::Attribute {
+        Component::AttributeInNoNamespaceExists {
+            ref local_name,
+            ref local_name_lower,
+        } if bucket_attributes => Bucket::Attribute {
             name: local_name,
             lower_name: local_name_lower,
         },
@@ -656,8 +663,12 @@ fn specific_bucket_for<'a>(
         //
         // So inserting `span` in the rule hash makes sense since we want to
         // match the slotted <span>.
-        Component::Slotted(ref selector) => find_bucket(selector.iter(), disjoint_buckets, bucket_attributes),
-        Component::Host(Some(ref selector)) => find_bucket(selector.iter(), disjoint_buckets, bucket_attributes),
+        Component::Slotted(ref selector) => {
+            find_bucket(selector.iter(), disjoint_buckets, bucket_attributes)
+        },
+        Component::Host(Some(ref selector)) => {
+            find_bucket(selector.iter(), disjoint_buckets, bucket_attributes)
+        },
         Component::Is(ref list) | Component::Where(ref list) => {
             if list.len() == 1 {
                 find_bucket(list[0].iter(), disjoint_buckets, bucket_attributes)
diff --git a/components/style/selector_parser.rs b/components/style/selector_parser.rs
index 8e0e3412d4b..d28e333da04 100644
--- a/components/style/selector_parser.rs
+++ b/components/style/selector_parser.rs
@@ -76,8 +76,7 @@ impl<'a> SelectorParser<'a> {
     /// Whether we're parsing selectors in a stylesheet that has chrome
     /// privilege.
     pub fn chrome_rules_enabled(&self) -> bool {
-        self.url_data.chrome_rules_enabled() ||
-            self.stylesheet_origin == Origin::User
+        self.url_data.chrome_rules_enabled() || self.stylesheet_origin == Origin::User
     }
 }
 
diff --git a/components/style/shared_lock.rs b/components/style/shared_lock.rs
index d524f0c6cdf..55708a9f7bb 100644
--- a/components/style/shared_lock.rs
+++ b/components/style/shared_lock.rs
@@ -97,7 +97,10 @@ impl SharedRwLock {
     #[cfg(feature = "gecko")]
     #[inline]
     fn ptr(&self) -> *const SomethingZeroSizedButTyped {
-        self.cell.as_ref().map(|cell| cell.as_ptr() as *const _).unwrap_or(ptr::null())
+        self.cell
+            .as_ref()
+            .map(|cell| cell.as_ptr() as *const _)
+            .unwrap_or(ptr::null())
     }
 
     /// Wrap the given data to make its access protected by this lock.
@@ -154,7 +157,10 @@ impl<'a> SharedRwLockReadGuard<'a> {
     #[inline]
     #[cfg(feature = "gecko")]
     fn ptr(&self) -> *const SomethingZeroSizedButTyped {
-        self.0.as_ref().map(|r| &**r as *const _).unwrap_or(ptr::null())
+        self.0
+            .as_ref()
+            .map(|r| &**r as *const _)
+            .unwrap_or(ptr::null())
     }
 }
 
diff --git a/components/style/style_adjuster.rs b/components/style/style_adjuster.rs
index 31028f98571..d12864155dd 100644
--- a/components/style/style_adjuster.rs
+++ b/components/style/style_adjuster.rs
@@ -760,9 +760,9 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
     /// the same font as its fallback ('list-style-type') in case it fails to load.
     #[cfg(feature = "gecko")]
     fn adjust_for_marker_pseudo(&mut self) {
+        use crate::values::computed::counters::Content;
         use crate::values::computed::font::{FontFamily, FontSynthesis};
         use crate::values::computed::text::{LetterSpacing, WordSpacing};
-        use crate::values::computed::counters::{Content};
 
         let is_legacy_marker = self.style.pseudo.map_or(false, |p| p.is_marker()) &&
             self.style.get_list().clone_list_style_type().is_bullet() &&
@@ -770,21 +770,49 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
         if !is_legacy_marker {
             return;
         }
-        if !self.style.flags.get().contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_FONT_FAMILY) {
-            self.style.mutate_font().set_font_family(FontFamily::moz_bullet().clone());
+        if !self
+            .style
+            .flags
+            .get()
+            .contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_FONT_FAMILY)
+        {
+            self.style
+                .mutate_font()
+                .set_font_family(FontFamily::moz_bullet().clone());
 
             // FIXME(mats): We can remove this if support for font-synthesis is added to @font-face rules.
             // Then we can add it to the @font-face rule in html.css instead.
             // https://github.com/w3c/csswg-drafts/issues/6081
-            if !self.style.flags.get().contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_FONT_SYNTHESIS) {
-                self.style.mutate_font().set_font_synthesis(FontSynthesis::none());
+            if !self
+                .style
+                .flags
+                .get()
+                .contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_FONT_SYNTHESIS)
+            {
+                self.style
+                    .mutate_font()
+                    .set_font_synthesis(FontSynthesis::none());
             }
         }
-        if !self.style.flags.get().contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_LETTER_SPACING) {
-            self.style.mutate_inherited_text().set_letter_spacing(LetterSpacing::normal());
+        if !self
+            .style
+            .flags
+            .get()
+            .contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_LETTER_SPACING)
+        {
+            self.style
+                .mutate_inherited_text()
+                .set_letter_spacing(LetterSpacing::normal());
         }
-        if !self.style.flags.get().contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_WORD_SPACING) {
-            self.style.mutate_inherited_text().set_word_spacing(WordSpacing::normal());
+        if !self
+            .style
+            .flags
+            .get()
+            .contains(ComputedValueFlags::HAS_AUTHOR_SPECIFIED_WORD_SPACING)
+        {
+            self.style
+                .mutate_inherited_text()
+                .set_word_spacing(WordSpacing::normal());
         }
     }
 
diff --git a/components/style/stylesheets/import_rule.rs b/components/style/stylesheets/import_rule.rs
index 7352dea0b9e..ccf0bb11e51 100644
--- a/components/style/stylesheets/import_rule.rs
+++ b/components/style/stylesheets/import_rule.rs
@@ -10,8 +10,8 @@ use crate::media_queries::MediaList;
 use crate::shared_lock::{DeepCloneParams, DeepCloneWithLock};
 use crate::shared_lock::{SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
 use crate::str::CssStringWriter;
-use crate::stylesheets::{CssRule, StylesheetInDocument};
 use crate::stylesheets::layer_rule::LayerName;
+use crate::stylesheets::{CssRule, StylesheetInDocument};
 use crate::values::CssUrl;
 use cssparser::SourceLocation;
 use std::fmt::{self, Write};
@@ -131,7 +131,6 @@ pub struct ImportLayer {
     pub name: Option<LayerName>,
 }
 
-
 impl ToCss for ImportLayer {
     fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
     where
diff --git a/components/style/stylesheets/loader.rs b/components/style/stylesheets/loader.rs
index c145bafdc04..45f7d22a55c 100644
--- a/components/style/stylesheets/loader.rs
+++ b/components/style/stylesheets/loader.rs
@@ -8,7 +8,7 @@
 use crate::media_queries::MediaList;
 use crate::parser::ParserContext;
 use crate::shared_lock::{Locked, SharedRwLock};
-use crate::stylesheets::import_rule::{ImportRule, ImportLayer};
+use crate::stylesheets::import_rule::{ImportLayer, ImportRule};
 use crate::values::CssUrl;
 use cssparser::SourceLocation;
 use servo_arc::Arc;
diff --git a/components/style/stylesheets/mod.rs b/components/style/stylesheets/mod.rs
index 762bca6033f..f7098e0c151 100644
--- a/components/style/stylesheets/mod.rs
+++ b/components/style/stylesheets/mod.rs
@@ -509,11 +509,11 @@ impl DeepCloneWithLock for CssRule {
                 CssRule::Layer(Arc::new(
                     lock.wrap(rule.deep_clone_with_lock(lock, guard, params)),
                 ))
-            }
+            },
             CssRule::ScrollTimeline(ref arc) => {
                 let rule = arc.read_with(guard);
                 CssRule::ScrollTimeline(Arc::new(lock.wrap(rule.clone())))
-            }
+            },
         }
     }
 }
diff --git a/components/style/stylesheets/rule_parser.rs b/components/style/stylesheets/rule_parser.rs
index 995ee801e40..12ec7226bfc 100644
--- a/components/style/stylesheets/rule_parser.rs
+++ b/components/style/stylesheets/rule_parser.rs
@@ -289,7 +289,7 @@ impl<'a, 'i> AtRuleParser<'i> for TopLevelRuleParser<'a> {
         &mut self,
         prelude: AtRulePrelude,
         start: &ParserState,
-    ) -> Result<Self::AtRule, ()>  {
+    ) -> Result<Self::AtRule, ()> {
         let rule = match prelude {
             AtRulePrelude::Import(url, media, layer) => {
                 let loader = self
@@ -613,15 +613,13 @@ impl<'a, 'b, 'i> AtRuleParser<'i> for NestedRuleParser<'a, 'b> {
                     0 | 1 => names.into_iter().next(),
                     _ => return Err(input.new_error(BasicParseErrorKind::AtRuleBodyInvalid)),
                 };
-                Ok(CssRule::Layer(Arc::new(self.shared_lock.wrap(
-                    LayerRule {
-                        kind: LayerRuleKind::Block {
-                            name,
-                            rules: self.parse_nested_rules(input, CssRuleType::Layer),
-                        },
-                        source_location: start.source_location(),
+                Ok(CssRule::Layer(Arc::new(self.shared_lock.wrap(LayerRule {
+                    kind: LayerRuleKind::Block {
+                        name,
+                        rules: self.parse_nested_rules(input, CssRuleType::Layer),
                     },
-                ))))
+                    source_location: start.source_location(),
+                }))))
             },
             AtRulePrelude::Import(..) | AtRulePrelude::Namespace(..) => {
                 // These rules don't have blocks.
@@ -650,7 +648,7 @@ impl<'a, 'b, 'i> AtRuleParser<'i> for NestedRuleParser<'a, 'b> {
         &mut self,
         prelude: AtRulePrelude,
         start: &ParserState,
-    ) -> Result<Self::AtRule, ()>  {
+    ) -> Result<Self::AtRule, ()> {
         Ok(match prelude {
             AtRulePrelude::Layer(names) => {
                 if names.is_empty() {
@@ -687,7 +685,10 @@ fn check_for_useless_selector(
                 }
                 if found_host && found_non_host {
                     let location = input.current_source_location();
-                    context.log_css_error(location, ContextualParseError::NeverMatchingHostSelector(selector.to_css_string()));
+                    context.log_css_error(
+                        location,
+                        ContextualParseError::NeverMatchingHostSelector(selector.to_css_string()),
+                    );
                     continue 'selector_loop;
                 }
             }
diff --git a/components/style/stylesheets/rules_iterator.rs b/components/style/stylesheets/rules_iterator.rs
index 32851dd2cca..0cbc7327441 100644
--- a/components/style/stylesheets/rules_iterator.rs
+++ b/components/style/stylesheets/rules_iterator.rs
@@ -111,7 +111,7 @@ where
                     LayerRuleKind::Block { ref rules, .. } => Some(rules.read_with(guard).0.iter()),
                     LayerRuleKind::Statement { .. } => None,
                 }
-            }
+            },
         }
     }
 }
@@ -323,7 +323,8 @@ impl<'a, 'b> EffectiveRulesIterator<'a, 'b> {
         guard: &'a SharedRwLockReadGuard<'b>,
         rule: &'a CssRule,
     ) -> Self {
-        let children = RulesIterator::<AllRules>::children(rule, device, quirks_mode, guard, &mut false);
+        let children =
+            RulesIterator::<AllRules>::children(rule, device, quirks_mode, guard, &mut false);
         EffectiveRulesIterator::new(device, quirks_mode, guard, children.unwrap_or([].iter()))
     }
 }
diff --git a/components/style/stylesheets/stylesheet.rs b/components/style/stylesheets/stylesheet.rs
index 1b6b59bac78..e63d8187365 100644
--- a/components/style/stylesheets/stylesheet.rs
+++ b/components/style/stylesheets/stylesheet.rs
@@ -591,9 +591,11 @@ impl Clone for Stylesheet {
         // Make a deep clone of the media, using the new lock.
         let media = self.media.read_with(&guard).clone();
         let media = Arc::new(lock.wrap(media));
-        let contents = Arc::new(self
-            .contents
-            .deep_clone_with_lock(&lock, &guard, &DeepCloneParams));
+        let contents = Arc::new(self.contents.deep_clone_with_lock(
+            &lock,
+            &guard,
+            &DeepCloneParams,
+        ));
 
         Stylesheet {
             contents,
diff --git a/components/style/stylist.rs b/components/style/stylist.rs
index 0663ea440d9..a5538aa1189 100644
--- a/components/style/stylist.rs
+++ b/components/style/stylist.rs
@@ -11,7 +11,9 @@ use crate::element_state::{DocumentState, ElementState};
 #[cfg(feature = "gecko")]
 use crate::gecko_bindings::structs::{ServoStyleSetSizes, StyleRuleInclusion};
 use crate::invalidation::element::invalidation_map::InvalidationMap;
-use crate::invalidation::media_queries::{EffectiveMediaQueryResults, MediaListKey, ToMediaListKey};
+use crate::invalidation::media_queries::{
+    EffectiveMediaQueryResults, MediaListKey, ToMediaListKey,
+};
 use crate::invalidation::stylesheets::RuleChangeKind;
 use crate::media_queries::Device;
 use crate::properties::{self, CascadeMode, ComputedValues};
@@ -25,15 +27,18 @@ use crate::shared_lock::{Locked, SharedRwLockReadGuard, StylesheetGuards};
 use crate::stylesheet_set::{DataValidity, DocumentStylesheetSet, SheetRebuildKind};
 use crate::stylesheet_set::{DocumentStylesheetFlusher, SheetCollectionFlusher};
 use crate::stylesheets::keyframes_rule::KeyframesAnimation;
-use crate::stylesheets::layer_rule::{LayerName, LayerId, LayerOrder};
+use crate::stylesheets::layer_rule::{LayerId, LayerName, LayerOrder};
 use crate::stylesheets::viewport_rule::{self, MaybeNew, ViewportRule};
-use crate::stylesheets::{StyleRule, StylesheetInDocument, StylesheetContents};
 #[cfg(feature = "gecko")]
 use crate::stylesheets::{CounterStyleRule, FontFaceRule, FontFeatureValuesRule, PageRule};
-use crate::stylesheets::{CssRule, Origin, OriginSet, PerOrigin, PerOriginIter, EffectiveRulesIterator};
+use crate::stylesheets::{
+    CssRule, EffectiveRulesIterator, Origin, OriginSet, PerOrigin, PerOriginIter,
+};
+use crate::stylesheets::{StyleRule, StylesheetContents, StylesheetInDocument};
 use crate::thread_state::{self, ThreadState};
 use crate::{Atom, LocalName, Namespace, WeakAtom};
 use fallible::FallibleVec;
+use fxhash::FxHashMap;
 use hashglobe::FailedAllocationError;
 use malloc_size_of::MallocSizeOf;
 #[cfg(feature = "gecko")]
@@ -48,11 +53,10 @@ use selectors::NthIndexCache;
 use servo_arc::{Arc, ArcBorrow};
 use smallbitvec::SmallBitVec;
 use smallvec::SmallVec;
+use std::hash::{Hash, Hasher};
 use std::sync::Mutex;
 use std::{mem, ops};
-use std::hash::{Hash, Hasher};
 use style_traits::viewport::ViewportConstraints;
-use fxhash::FxHashMap;
 
 /// The type of the stylesheets that the stylist contains.
 #[cfg(feature = "servo")]
@@ -93,7 +97,7 @@ struct CascadeDataCacheKey {
 unsafe impl Send for CascadeDataCacheKey {}
 unsafe impl Sync for CascadeDataCacheKey {}
 
-trait CascadeDataCacheEntry : Sized {
+trait CascadeDataCacheEntry: Sized {
     /// Returns a reference to the cascade data.
     fn cascade_data(&self) -> &CascadeData;
     /// Rebuilds the cascade data for the new stylesheet collection. The
@@ -121,7 +125,9 @@ where
     Entry: CascadeDataCacheEntry,
 {
     fn new() -> Self {
-        Self { entries: Default::default() }
+        Self {
+            entries: Default::default(),
+        }
     }
 
     fn len(&self) -> usize {
@@ -165,15 +171,9 @@ where
         match self.entries.entry(key) {
             HashMapEntry::Vacant(e) => {
                 debug!("> Picking the slow path (not in the cache)");
-                new_entry = Entry::rebuild(
-                    device,
-                    quirks_mode,
-                    collection,
-                    guard,
-                    old_entry,
-                )?;
+                new_entry = Entry::rebuild(device, quirks_mode, collection, guard, old_entry)?;
                 e.insert(new_entry.clone());
-            }
+            },
             HashMapEntry::Occupied(mut e) => {
                 // Avoid reusing our old entry (this can happen if we get
                 // invalidated due to CSSOM mutations and our old stylesheet
@@ -192,15 +192,9 @@ where
                 }
 
                 debug!("> Picking the slow path due to same entry as old");
-                new_entry = Entry::rebuild(
-                    device,
-                    quirks_mode,
-                    collection,
-                    guard,
-                    old_entry,
-                )?;
+                new_entry = Entry::rebuild(device, quirks_mode, collection, guard, old_entry)?;
                 e.insert(new_entry.clone());
-            }
+            },
         }
 
         Ok(Some(new_entry))
@@ -272,7 +266,7 @@ impl CascadeDataCacheEntry for UserAgentCascadeData {
         _old: &Self,
     ) -> Result<Arc<Self>, FailedAllocationError>
     where
-        S: StylesheetInDocument + PartialEq + 'static
+        S: StylesheetInDocument + PartialEq + 'static,
     {
         // TODO: Maybe we should support incremental rebuilds, though they seem
         // uncommon and rebuild() doesn't deal with
@@ -604,13 +598,8 @@ impl Stylist {
     where
         S: StylesheetInDocument + PartialEq + 'static,
     {
-        self.author_data_cache.lookup(
-            &self.device,
-            self.quirks_mode,
-            collection,
-            guard,
-            old_data,
-        )
+        self.author_data_cache
+            .lookup(&self.device, self.quirks_mode, collection, guard, old_data)
     }
 
     /// Iterate over the extra data in origin order.
@@ -2114,7 +2103,11 @@ impl CascadeData {
     }
 
     fn compute_layer_order(&mut self) {
-        debug_assert_ne!(self.layers.len(), 0, "There should be at least the root layer!");
+        debug_assert_ne!(
+            self.layers.len(),
+            0,
+            "There should be at least the root layer!"
+        );
         if self.layers.len() == 1 {
             return; // Nothing to do
         }
@@ -2131,7 +2124,10 @@ impl CascadeData {
             order: &mut LayerOrder,
         ) {
             for child in parent.children.iter() {
-                debug_assert!(parent.id < *child, "Children are always registered after parents");
+                debug_assert!(
+                    parent.id < *child,
+                    "Children are always registered after parents"
+                );
                 let child_index = (child.0 - parent.id.0 - 1) as usize;
                 let (first, remaining) = remaining_layers.split_at_mut(child_index + 1);
                 let child = &mut first[child_index];
@@ -2323,7 +2319,10 @@ impl CascadeData {
 
                     let keyframes_rule = keyframes_rule.read_with(guard);
                     debug!("Found valid keyframes rule: {:?}", *keyframes_rule);
-                    match self.animations.try_entry(keyframes_rule.name.as_atom().clone())? {
+                    match self
+                        .animations
+                        .try_entry(keyframes_rule.name.as_atom().clone())?
+                    {
                         Entry::Vacant(e) => {
                             e.insert(KeyframesAnimation::from_keyframes(
                                 &keyframes_rule.keyframes,
@@ -2338,9 +2337,8 @@ impl CascadeData {
                             //
                             // TODO(emilio): This will need to be harder for
                             // layers.
-                            let needs_insert =
-                                 keyframes_rule.vendor_prefix.is_none() ||
-                                 e.get().vendor_prefix.is_some();
+                            let needs_insert = keyframes_rule.vendor_prefix.is_none() ||
+                                e.get().vendor_prefix.is_some();
                             if needs_insert {
                                 e.insert(KeyframesAnimation::from_keyframes(
                                     &keyframes_rule.keyframes,
@@ -2401,13 +2399,8 @@ impl CascadeData {
             }
 
             let mut effective = false;
-            let children = EffectiveRulesIterator::children(
-                rule,
-                device,
-                quirks_mode,
-                guard,
-                &mut effective,
-            );
+            let children =
+                EffectiveRulesIterator::children(rule, device, quirks_mode, guard, &mut effective);
 
             if !effective {
                 continue;
@@ -2426,7 +2419,8 @@ impl CascadeData {
                     let mut parent = layer.clone();
                     parent.0.pop();
 
-                    *data.layer_id
+                    *data
+                        .layer_id
                         .get_mut(&parent)
                         .expect("Parent layers should be registered before child layers")
                 } else {
@@ -2489,7 +2483,6 @@ impl CascadeData {
                             &mut layer_names_to_pop,
                         );
                     }
-
                 },
                 CssRule::Media(ref lock) => {
                     if rebuild_kind.should_rebuild_invalidation() {
@@ -2509,7 +2502,7 @@ impl CascadeData {
                                 &mut current_layer,
                                 &mut layer_names_to_pop,
                             );
-                        }
+                        },
                         LayerRuleKind::Statement { ref names } => {
                             for name in &**names {
                                 let mut pushed = 0;
@@ -2525,7 +2518,7 @@ impl CascadeData {
                                     current_layer.0.pop();
                                 }
                             }
-                        }
+                        },
                     }
                 },
                 // We don't care about any other rule.
@@ -2609,7 +2602,9 @@ impl CascadeData {
 
         let effective_now = stylesheet.is_effective_for_device(device, guard);
 
-        let effective_then = self.effective_media_query_results.was_effective(stylesheet.contents());
+        let effective_then = self
+            .effective_media_query_results
+            .was_effective(stylesheet.contents());
 
         if effective_now != effective_then {
             debug!(
@@ -2739,7 +2734,7 @@ impl CascadeDataCacheEntry for CascadeData {
         old: &Self,
     ) -> Result<Arc<Self>, FailedAllocationError>
     where
-        S: StylesheetInDocument + PartialEq + 'static
+        S: StylesheetInDocument + PartialEq + 'static,
     {
         debug_assert!(collection.dirty(), "We surely need to do something?");
         // If we're doing a full rebuild anyways, don't bother cloning the data.
diff --git a/components/style/values/animated/transform.rs b/components/style/values/animated/transform.rs
index 598bf9b59a7..542b4c31023 100644
--- a/components/style/values/animated/transform.rs
+++ b/components/style/values/animated/transform.rs
@@ -1122,7 +1122,7 @@ impl Animate for ComputedTransformOperation {
                             1.
                         } else {
                             -1. / perspective_z
-                        }
+                        },
                     ))
                 };
                 Ok(TransformOperation::Perspective(used_value))
@@ -1204,10 +1204,9 @@ impl ComputeSquaredDistance for ComputedTransformOperation {
             (
                 &TransformOperation::Perspective(ref fd),
                 &TransformOperation::Perspective(ref td),
-            ) => {
-                fd.infinity_or(|l| l.px())
-                    .compute_squared_distance(&td.infinity_or(|l| l.px()))
-            },
+            ) => fd
+                .infinity_or(|l| l.px())
+                .compute_squared_distance(&td.infinity_or(|l| l.px())),
             (&TransformOperation::Perspective(ref p), &TransformOperation::Matrix3D(ref m)) |
             (&TransformOperation::Matrix3D(ref m), &TransformOperation::Perspective(ref p)) => {
                 // FIXME(emilio): Is this right? Why interpolating this with
diff --git a/components/style/values/computed/color.rs b/components/style/values/computed/color.rs
index 36cd1db4a42..6b970181d85 100644
--- a/components/style/values/computed/color.rs
+++ b/components/style/values/computed/color.rs
@@ -6,7 +6,7 @@
 
 use crate::values::animated::color::RGBA as AnimatedRGBA;
 use crate::values::animated::ToAnimatedValue;
-use crate::values::generics::color::{GenericColor, GenericColorOrAuto, GenericCaretColor};
+use crate::values::generics::color::{GenericCaretColor, GenericColor, GenericColorOrAuto};
 use cssparser::{Color as CSSParserColor, RGBA};
 use std::fmt;
 use style_traits::{CssWriter, ToCss};
diff --git a/components/style/values/computed/font.rs b/components/style/values/computed/font.rs
index 18fbe8c6fd8..ab6755d0951 100644
--- a/components/style/values/computed/font.rs
+++ b/components/style/values/computed/font.rs
@@ -202,7 +202,6 @@ macro_rules! static_font_family {
     };
 }
 
-
 impl FontFamily {
     #[inline]
     /// Get default font family as `serif` which is a generic font-family
@@ -213,10 +212,13 @@ impl FontFamily {
     /// Returns the font family for `-moz-bullet-font`.
     #[cfg(feature = "gecko")]
     pub(crate) fn moz_bullet() -> &'static Self {
-        static_font_family!(MOZ_BULLET, SingleFontFamily::FamilyName(FamilyName {
-            name: atom!("-moz-bullet-font"),
-            syntax: FontFamilyNameSyntax::Identifiers,
-        }));
+        static_font_family!(
+            MOZ_BULLET,
+            SingleFontFamily::FamilyName(FamilyName {
+                name: atom!("-moz-bullet-font"),
+                syntax: FontFamilyNameSyntax::Identifiers,
+            })
+        );
 
         &*MOZ_BULLET
     }
@@ -226,10 +228,12 @@ impl FontFamily {
     pub fn for_system_font(name: &str) -> Self {
         Self {
             families: FontFamilyList {
-                list: crate::ArcSlice::from_iter(std::iter::once(SingleFontFamily::FamilyName(FamilyName {
-                    name: Atom::from(name),
-                    syntax: FontFamilyNameSyntax::Identifiers,
-                }))),
+                list: crate::ArcSlice::from_iter(std::iter::once(SingleFontFamily::FamilyName(
+                    FamilyName {
+                        name: Atom::from(name),
+                        syntax: FontFamilyNameSyntax::Identifiers,
+                    },
+                ))),
                 fallback: GenericFontFamily::None,
             },
             is_system_font: true,
@@ -240,8 +244,11 @@ impl FontFamily {
     pub fn generic(generic: GenericFontFamily) -> &'static Self {
         macro_rules! generic_font_family {
             ($ident:ident, $family:ident) => {
-                static_font_family!($ident, SingleFontFamily::Generic(GenericFontFamily::$family))
-            }
+                static_font_family!(
+                    $ident,
+                    SingleFontFamily::Generic(GenericFontFamily::$family)
+                )
+            };
         }
 
         generic_font_family!(SERIF, Serif);
@@ -257,7 +264,7 @@ impl FontFamily {
             GenericFontFamily::None => {
                 debug_assert!(false, "Bogus caller!");
                 &*SERIF
-            }
+            },
             GenericFontFamily::Serif => &*SERIF,
             GenericFontFamily::SansSerif => &*SANS_SERIF,
             GenericFontFamily::Monospace => &*MONOSPACE,
@@ -444,24 +451,21 @@ impl GenericFontFamily {
     /// families that the website might specify, since they're not configured by
     /// the user. See bug 789788 and bug 1730098.
     #[cfg(feature = "gecko")]
-    pub (crate) fn valid_for_user_font_prioritization(self) -> bool {
+    pub(crate) fn valid_for_user_font_prioritization(self) -> bool {
         match self {
-            Self::None |
-            Self::Fantasy |
-            Self::Cursive |
-            Self::SystemUi |
-            Self::MozEmoji => false,
+            Self::None | Self::Fantasy | Self::Cursive | Self::SystemUi | Self::MozEmoji => false,
 
-            Self::Serif |
-            Self::SansSerif |
-            Self::Monospace => true,
+            Self::Serif | Self::SansSerif | Self::Monospace => true,
         }
     }
 }
 
 impl Parse for SingleFontFamily {
     /// Parse a font-family value.
-    fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
         if let Ok(value) = input.try_parse(|i| i.expect_string_cloned()) {
             return Ok(SingleFontFamily::FamilyName(FamilyName {
                 name: Atom::from(&*value),
@@ -603,13 +607,11 @@ impl FontFamilyList {
     /// font prioritization, then move it to the front of the list. Otherwise,
     /// prepend the default generic.
     #[cfg(feature = "gecko")]
-    pub (crate) fn prioritize_first_generic_or_prepend(&mut self, generic: GenericFontFamily) {
-        let index_of_first_generic = self.iter().position(|f| {
-            match *f {
-                SingleFontFamily::Generic(f) => f.valid_for_user_font_prioritization(),
-                _ => false,
-            }
-        });
+    pub(crate) fn prioritize_first_generic_or_prepend(&mut self, generic: GenericFontFamily) {
+        let index_of_first_generic = self.iter().position(|f| match *f {
+            SingleFontFamily::Generic(f) => f.valid_for_user_font_prioritization(),
+            _ => false,
+         });
 
         if let Some(0) = index_of_first_generic {
             return; // Already first
diff --git a/components/style/values/computed/image.rs b/components/style/values/computed/image.rs
index a0cb8f3fe45..980017b2822 100644
--- a/components/style/values/computed/image.rs
+++ b/components/style/values/computed/image.rs
@@ -84,7 +84,6 @@ impl ToComputedValue for specified::ImageSet {
         let mut selected_resolution = items[0].resolution.dppx();
 
         for (i, item) in items.iter().enumerate() {
-
             // If the MIME type is not supported, we discard the ImageSetItem
             if item.has_mime_type && !context.device().is_supported_mime_type(&item.mime_type) {
                 continue;
diff --git a/components/style/values/computed/length.rs b/components/style/values/computed/length.rs
index f455da5f676..b8ff80587e6 100644
--- a/components/style/values/computed/length.rs
+++ b/components/style/values/computed/length.rs
@@ -37,7 +37,9 @@ impl ToComputedValue for specified::NoCalcLength {
                 length.to_computed_value(context, FontBaseSize::CurrentStyle)
             },
             specified::NoCalcLength::ViewportPercentage(length) => {
-                context.builder.add_flags(ComputedValueFlags::USES_VIEWPORT_UNITS);
+                context
+                    .builder
+                    .add_flags(ComputedValueFlags::USES_VIEWPORT_UNITS);
                 length.to_computed_value(context.viewport_size_for_viewport_unit_resolution())
             },
             specified::NoCalcLength::ServoCharacterWidth(length) => {
@@ -191,7 +193,7 @@ impl Size {
             GenericSize::MaxContent |
             GenericSize::FitContent |
             GenericSize::MozAvailable |
-            GenericSize::FitContentFunction(_) => false
+            GenericSize::FitContentFunction(_) => false,
         }
     }
 }
diff --git a/components/style/values/computed/mod.rs b/components/style/values/computed/mod.rs
index 9d775b45cd4..ad7663804be 100644
--- a/components/style/values/computed/mod.rs
+++ b/components/style/values/computed/mod.rs
@@ -62,7 +62,7 @@ pub use self::font::{FontSize, FontSizeAdjust, FontStretch, FontSynthesis};
 pub use self::font::{FontVariantAlternates, FontWeight};
 pub use self::font::{FontVariantEastAsian, FontVariationSettings};
 pub use self::font::{MathDepth, MozScriptMinSize, MozScriptSizeMultiplier, XLang, XTextZoom};
-pub use self::image::{Gradient, Image, LineDirection, MozImageRect, ImageRendering};
+pub use self::image::{Gradient, Image, ImageRendering, LineDirection, MozImageRect};
 pub use self::length::{CSSPixelLength, NonNegativeLength};
 pub use self::length::{Length, LengthOrNumber, LengthPercentage, NonNegativeLengthOrNumber};
 pub use self::length::{LengthOrAuto, LengthPercentageOrAuto, MaxSize, Size};
diff --git a/components/style/values/computed/text.rs b/components/style/values/computed/text.rs
index 629626b06b3..0920156108f 100644
--- a/components/style/values/computed/text.rs
+++ b/components/style/values/computed/text.rs
@@ -18,7 +18,9 @@ use crate::Zero;
 use std::fmt::{self, Write};
 use style_traits::{CssWriter, ToCss};
 
-pub use crate::values::specified::text::{TextAlignLast, TextUnderlinePosition, MozControlCharacterVisibility};
+pub use crate::values::specified::text::{
+    MozControlCharacterVisibility, TextAlignLast, TextUnderlinePosition,
+};
 pub use crate::values::specified::{LineBreak, OverflowWrap, RubyPosition, WordBreak};
 pub use crate::values::specified::{TextDecorationLine, TextEmphasisPosition};
 pub use crate::values::specified::{TextDecorationSkipInk, TextJustify, TextTransform};
diff --git a/components/style/values/computed/transform.rs b/components/style/values/computed/transform.rs
index 5eafa0cd627..d70349ee0fe 100644
--- a/components/style/values/computed/transform.rs
+++ b/components/style/values/computed/transform.rs
@@ -520,7 +520,7 @@ impl ToAnimatedZero for TransformOperation {
                 Ok(generic::TransformOperation::Rotate(Angle::zero()))
             },
             generic::TransformOperation::Perspective(_) => Ok(
-                generic::TransformOperation::Perspective(generic::PerspectiveFunction::None)
+                generic::TransformOperation::Perspective(generic::PerspectiveFunction::None),
             ),
             generic::TransformOperation::AccumulateMatrix { .. } |
             generic::TransformOperation::InterpolateMatrix { .. } => {
diff --git a/components/style/values/generics/counters.rs b/components/style/values/generics/counters.rs
index e5656faea56..2d9948cef4a 100644
--- a/components/style/values/generics/counters.rs
+++ b/components/style/values/generics/counters.rs
@@ -11,8 +11,8 @@ use crate::values::generics::CounterStyle;
 #[cfg(any(feature = "gecko", feature = "servo-layout-2020"))]
 use crate::values::specified::Attr;
 use crate::values::CustomIdent;
-use std::ops::Deref;
 use std::fmt::{self, Write};
+use std::ops::Deref;
 use style_traits::{CssWriter, ToCss};
 
 /// A name / value pair for counters.
@@ -238,15 +238,7 @@ impl<Image> Content<Image> {
 
 /// Items for the `content` property.
 #[derive(
-    Clone,
-    Debug,
-    Eq,
-    MallocSizeOf,
-    PartialEq,
-    ToComputedValue,
-    ToCss,
-    ToResolvedValue,
-    ToShmem,
+    Clone, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue, ToCss, ToResolvedValue, ToShmem,
 )]
 #[repr(u8)]
 pub enum GenericContentItem<I> {
diff --git a/components/style/values/generics/image.rs b/components/style/values/generics/image.rs
index 014ae46db02..fa53dd6ac8b 100644
--- a/components/style/values/generics/image.rs
+++ b/components/style/values/generics/image.rs
@@ -131,9 +131,7 @@ pub struct GenericImageSet<Image, Resolution> {
 }
 
 /// An optional percent and a cross fade image.
-#[derive(
-    Clone, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToResolvedValue, ToShmem,
-)]
+#[derive(Clone, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToResolvedValue, ToShmem)]
 #[repr(C)]
 pub struct GenericImageSetItem<Image, Resolution> {
     /// `<image>`. `<string>` is converted to `Image::Url` at parse time.
@@ -151,8 +149,7 @@ pub struct GenericImageSetItem<Image, Resolution> {
     pub has_mime_type: bool,
 }
 
-impl<I: style_traits::ToCss, R: style_traits::ToCss> ToCss for GenericImageSetItem<I, R>
-{
+impl<I: style_traits::ToCss, R: style_traits::ToCss> ToCss for GenericImageSetItem<I, R> {
     fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
     where
         W: fmt::Write,
diff --git a/components/style/values/generics/mod.rs b/components/style/values/generics/mod.rs
index c0cdf04b71d..b15d4f01887 100644
--- a/components/style/values/generics/mod.rs
+++ b/components/style/values/generics/mod.rs
@@ -106,7 +106,7 @@ impl CounterStyle {
                     name == &atom!("square") ||
                     name == &atom!("disclosure-closed") ||
                     name == &atom!("disclosure-open")
-            }
+            },
             _ => false,
         }
     }
diff --git a/components/style/values/generics/transform.rs b/components/style/values/generics/transform.rs
index 604872ba5dc..816dde92e4f 100644
--- a/components/style/values/generics/transform.rs
+++ b/components/style/values/generics/transform.rs
@@ -733,7 +733,7 @@ where
                         dest.write_char(' ')?;
                         z.to_css(dest)?;
                         dest.write_char(' ')?;
-                    }
+                    },
                 }
                 angle.to_css(dest)
             },
diff --git a/components/style/values/generics/ui.rs b/components/style/values/generics/ui.rs
index ff6aefdc63e..4d9515199ad 100644
--- a/components/style/values/generics/ui.rs
+++ b/components/style/values/generics/ui.rs
@@ -56,15 +56,7 @@ impl<Image: ToCss> ToCss for Cursor<Image> {
 }
 
 /// A generic value for item of `image cursors`.
-#[derive(
-    Clone,
-    Debug,
-    MallocSizeOf,
-    PartialEq,
-    ToComputedValue,
-    ToResolvedValue,
-    ToShmem,
-)]
+#[derive(Clone, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToResolvedValue, ToShmem)]
 #[repr(C)]
 pub struct GenericCursorImage<Image, Number> {
     /// The url to parse images from.
diff --git a/components/style/values/mod.rs b/components/style/values/mod.rs
index b8e7f1f3b8b..626fc32ff18 100644
--- a/components/style/values/mod.rs
+++ b/components/style/values/mod.rs
@@ -547,9 +547,7 @@ impl Parse for TimelineOrKeyframesName {
                 s,
                 &["none"],
             )?)),
-            Token::QuotedString(ref s) => {
-                Ok(Self::QuotedString(Atom::from(s.as_ref())))
-            },
+            Token::QuotedString(ref s) => Ok(Self::QuotedString(Atom::from(s.as_ref()))),
             ref t => Err(location.new_unexpected_token_error(t.clone())),
         }
     }
diff --git a/components/style/values/resolved/color.rs b/components/style/values/resolved/color.rs
index dbf6375e5bf..ea912945c5a 100644
--- a/components/style/values/resolved/color.rs
+++ b/components/style/values/resolved/color.rs
@@ -40,6 +40,8 @@ impl ToResolvedValue for computed::CaretColor {
 
     #[inline]
     fn from_resolved_value(resolved: Self::ResolvedValue) -> Self {
-        generics::CaretColor(generics::ColorOrAuto::Color(computed::Color::from_resolved_value(resolved)))
+        generics::CaretColor(generics::ColorOrAuto::Color(
+            computed::Color::from_resolved_value(resolved),
+        ))
     }
 }
diff --git a/components/style/values/resolved/counters.rs b/components/style/values/resolved/counters.rs
index cdaebcdea3e..e246dd567f9 100644
--- a/components/style/values/resolved/counters.rs
+++ b/components/style/values/resolved/counters.rs
@@ -31,19 +31,22 @@ impl ToResolvedValue for computed::Content {
 
     #[inline]
     fn to_resolved_value(self, context: &Context) -> Self {
-        let (is_pseudo, is_before_or_after, is_marker) =
-            match context.style.pseudo() {
-                Some(ref pseudo) => (true, pseudo.is_before_or_after(), pseudo.is_marker()),
-                None => (false, false, false)
-            };
+        let (is_pseudo, is_before_or_after, is_marker) = match context.style.pseudo() {
+            Some(ref pseudo) => (true, pseudo.is_before_or_after(), pseudo.is_marker()),
+            None => (false, false, false),
+        };
         match self {
             Self::Normal if is_before_or_after => Self::None,
             // For now, make `content: none` compute to `normal` for pseudos
             // other than ::before, ::after and ::marker, as we don't respect it.
             // https://github.com/w3c/csswg-drafts/issues/6124
             // Ditto for non-pseudo elements if the pref is disabled.
-            Self::None if (is_pseudo && !is_before_or_after && !is_marker) ||
-                (!is_pseudo && !allow_element_content_none()) => Self::Normal,
+            Self::None
+                if (is_pseudo && !is_before_or_after && !is_marker) ||
+                    (!is_pseudo && !allow_element_content_none()) =>
+            {
+                Self::Normal
+            },
             other => other,
         }
     }
diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index 7d5543cf7fc..67e90c0a8a2 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -1954,7 +1954,10 @@ impl BreakBetween {
     /// See https://drafts.csswg.org/css-break/#page-break-properties.
     #[cfg(feature = "gecko")]
     #[inline]
-    pub(crate) fn parse_legacy<'i>(_: &ParserContext, input: &mut Parser<'i, '_>) -> Result<Self, ParseError<'i>> {
+    pub(crate) fn parse_legacy<'i>(
+        _: &ParserContext,
+        input: &mut Parser<'i, '_>,
+    ) -> Result<Self, ParseError<'i>> {
         let break_value = BreakBetween::parse(input)?;
         match break_value {
             BreakBetween::Always => Ok(BreakBetween::Page),
@@ -2018,7 +2021,10 @@ impl BreakWithin {
     /// See https://drafts.csswg.org/css-break/#page-break-properties.
     #[cfg(feature = "gecko")]
     #[inline]
-    pub(crate) fn parse_legacy<'i>(_: &ParserContext, input: &mut Parser<'i, '_>) -> Result<Self, ParseError<'i>> {
+    pub(crate) fn parse_legacy<'i>(
+        _: &ParserContext,
+        input: &mut Parser<'i, '_>,
+    ) -> Result<Self, ParseError<'i>> {
         let break_value = BreakWithin::parse(input)?;
         match break_value {
             BreakWithin::Auto | BreakWithin::Avoid => Ok(break_value),
diff --git a/components/style/values/specified/calc.rs b/components/style/values/specified/calc.rs
index a043e4ea96e..d6997934554 100644
--- a/components/style/values/specified/calc.rs
+++ b/components/style/values/specified/calc.rs
@@ -380,43 +380,47 @@ impl CalcNode {
 
                     Ok(Self::MinMax(arguments.into(), op))
                 },
-                MathFunction::Sin |
-                MathFunction::Cos |
-                MathFunction::Tan => {
+                MathFunction::Sin | MathFunction::Cos | MathFunction::Tan => {
                     let argument = Self::parse_argument(context, input, CalcUnit::Angle)?;
                     let radians = match argument.to_number() {
                         Ok(v) => v,
                         Err(()) => match argument.to_angle() {
                             Ok(angle) => angle.radians(),
-                            Err(()) => return Err(
-                                input.new_custom_error(StyleParseErrorKind::UnspecifiedError)
-                            ),
+                            Err(()) => {
+                                return Err(
+                                    input.new_custom_error(StyleParseErrorKind::UnspecifiedError)
+                                )
+                            },
                         },
                     };
                     let number = match function {
                         MathFunction::Sin => radians.sin(),
                         MathFunction::Cos => radians.cos(),
                         MathFunction::Tan => radians.tan(),
-                        _ => unsafe { debug_unreachable!("We just checked!"); },
+                        _ => unsafe {
+                            debug_unreachable!("We just checked!");
+                        },
                     };
                     Ok(Self::Leaf(Leaf::Number(number)))
                 },
-                MathFunction::Asin |
-                MathFunction::Acos |
-                MathFunction::Atan => {
+                MathFunction::Asin | MathFunction::Acos | MathFunction::Atan => {
                     let argument = Self::parse_argument(context, input, CalcUnit::Number)?;
                     let number = match argument.to_number() {
                         Ok(v) => v,
-                        Err(()) => return Err(
-                            input.new_custom_error(StyleParseErrorKind::UnspecifiedError)
-                        ),
+                        Err(()) => {
+                            return Err(
+                                input.new_custom_error(StyleParseErrorKind::UnspecifiedError)
+                            )
+                        },
                     };
 
                     let radians = match function {
                         MathFunction::Asin => number.asin(),
                         MathFunction::Acos => number.acos(),
                         MathFunction::Atan => number.atan(),
-                        _ => unsafe { debug_unreachable!("We just checked!"); },
+                        _ => unsafe {
+                            debug_unreachable!("We just checked!");
+                        },
                     };
 
                     Ok(Self::Leaf(Leaf::Angle(Angle::from_radians(radians))))
@@ -597,7 +601,9 @@ impl CalcNode {
 
         let function = match MathFunction::from_ident(&*name) {
             Ok(f) => f,
-            Err(()) => return Err(location.new_unexpected_token_error(Token::Function(name.clone()))),
+            Err(()) => {
+                return Err(location.new_unexpected_token_error(Token::Function(name.clone())))
+            },
         };
 
         if matches!(function, Sin | Cos | Tan | Asin | Acos | Atan) && !trig_enabled() {
diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index c2f5df4bf32..3629b17058f 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -453,13 +453,12 @@ pub enum SystemColor {
 impl SystemColor {
     #[inline]
     fn compute(&self, cx: &Context) -> ComputedColor {
-        use crate::gecko_bindings::bindings;
         use crate::gecko::values::convert_nscolor_to_rgba;
+        use crate::gecko_bindings::bindings;
 
         // TODO: We should avoid cloning here most likely, though it's
         // cheap-ish.
-        let style_color_scheme =
-            cx.style().get_inherited_ui().clone_color_scheme();
+        let style_color_scheme = cx.style().get_inherited_ui().clone_color_scheme();
         let color = cx.device().system_nscolor(*self, &style_color_scheme);
         if color == bindings::NS_SAME_AS_FOREGROUND_COLOR {
             return ComputedColor::currentcolor();
@@ -932,7 +931,10 @@ impl ColorScheme {
 }
 
 impl Parse for ColorScheme {
-    fn parse<'i, 't>(_: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
+    fn parse<'i, 't>(
+        _: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
         let mut idents = vec![];
         let mut bits = ColorSchemeFlags::empty();
 
diff --git a/components/style/values/specified/counters.rs b/components/style/values/specified/counters.rs
index c9507ce8383..91fd7e77078 100644
--- a/components/style/values/specified/counters.rs
+++ b/components/style/values/specified/counters.rs
@@ -22,7 +22,11 @@ use selectors::parser::SelectorParseErrorKind;
 use style_traits::{KeywordsCollectFn, ParseError, SpecifiedValueInfo, StyleParseErrorKind};
 
 #[derive(PartialEq)]
-enum CounterType { Increment, Set, Reset, }
+enum CounterType {
+    Increment,
+    Set,
+    Reset,
+}
 
 impl CounterType {
     fn default_value(&self) -> i32 {
@@ -41,7 +45,11 @@ impl Parse for CounterIncrement {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        Ok(Self::new(parse_counters(context, input, CounterType::Increment)?))
+        Ok(Self::new(parse_counters(
+            context,
+            input,
+            CounterType::Increment,
+        )?))
     }
 }
 
@@ -65,7 +73,11 @@ impl Parse for CounterReset {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        Ok(Self::new(parse_counters(context, input, CounterType::Reset)?))
+        Ok(Self::new(parse_counters(
+            context,
+            input,
+            CounterType::Reset,
+        )?))
     }
 }
 
@@ -85,13 +97,20 @@ fn parse_counters<'i, 't>(
     loop {
         let location = input.current_source_location();
         let (name, is_reversed) = match input.next() {
-            Ok(&Token::Ident(ref ident)) => (CustomIdent::from_ident(location, ident, &["none"])?, false),
-            Ok(&Token::Function(ref name)) if counter_type == CounterType::Reset && name.eq_ignore_ascii_case("reversed") => {
+            Ok(&Token::Ident(ref ident)) => {
+                (CustomIdent::from_ident(location, ident, &["none"])?, false)
+            },
+            Ok(&Token::Function(ref name))
+                if counter_type == CounterType::Reset && name.eq_ignore_ascii_case("reversed") =>
+            {
                 input.parse_nested_block(|input| {
                     let location = input.current_source_location();
-                    Ok((CustomIdent::from_ident(location, input.expect_ident()?, &["none"])?, true))
+                    Ok((
+                        CustomIdent::from_ident(location, input.expect_ident()?, &["none"])?,
+                        true,
+                    ))
                 })?
-            }
+            },
             Ok(t) => {
                 let t = t.clone();
                 return Err(location.new_unexpected_token_error(t));
@@ -100,7 +119,7 @@ fn parse_counters<'i, 't>(
         };
 
         let value = match input.try_parse(|input| Integer::parse(context, input)) {
-            Ok(start) =>
+            Ok(start) => {
                 if start.value == i32::min_value() {
                     // The spec says that values must be clamped to the valid range,
                     // and we reserve i32::min_value() as an internal magic value.
@@ -108,10 +127,19 @@ fn parse_counters<'i, 't>(
                     Integer::new(i32::min_value() + 1)
                 } else {
                     start
-                },
-            _ => Integer::new(if is_reversed { i32::min_value() } else { counter_type.default_value() }),
+                }
+            },
+            _ => Integer::new(if is_reversed {
+                i32::min_value()
+            } else {
+                counter_type.default_value()
+            }),
         };
-        counters.push(CounterPair { name, value, is_reversed });
+        counters.push(CounterPair {
+            name,
+            value,
+            is_reversed,
+        });
     }
 
     if !counters.is_empty() {
diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index e78fec45d02..d11a2411a5d 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -8,16 +8,18 @@
 use crate::context::QuirksMode;
 use crate::parser::{Parse, ParserContext};
 use crate::values::computed::font::{FamilyName, FontFamilyList, FontStyleAngle, SingleFontFamily};
+use crate::values::computed::FontSizeAdjust as ComputedFontSizeAdjust;
 use crate::values::computed::{font as computed, Length, NonNegativeLength};
 use crate::values::computed::{Angle as ComputedAngle, Percentage as ComputedPercentage};
 use crate::values::computed::{CSSPixelLength, Context, ToComputedValue};
-use crate::values::computed::FontSizeAdjust as ComputedFontSizeAdjust;
 use crate::values::generics::font::VariationValue;
-use crate::values::generics::font::{self as generics, FeatureTagValue, FontSettings, FontTag, GenericFontSizeAdjust};
+use crate::values::generics::font::{
+    self as generics, FeatureTagValue, FontSettings, FontTag, GenericFontSizeAdjust,
+};
 use crate::values::generics::NonNegative;
 use crate::values::specified::length::{FontBaseSize, PX_PER_PT};
 use crate::values::specified::{AllowQuirks, Angle, Integer, LengthPercentage};
-use crate::values::specified::{NoCalcLength, NonNegativeNumber, Number, NonNegativePercentage};
+use crate::values::specified::{NoCalcLength, NonNegativeNumber, NonNegativePercentage, Number};
 use crate::values::CustomIdent;
 use crate::Atom;
 use cssparser::{Parser, Token};
@@ -406,7 +408,9 @@ impl ToComputedValue for FontStyle {
 ///
 /// https://drafts.csswg.org/css-fonts-4/#font-stretch-prop
 #[allow(missing_docs)]
-#[derive(Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
+#[derive(
+    Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToCss, ToShmem,
+)]
 #[repr(u8)]
 pub enum FontStretch {
     Stretch(NonNegativePercentage),
@@ -510,7 +514,9 @@ impl ToComputedValue for FontStretch {
     }
 
     fn from_computed_value(computed: &Self::ComputedValue) -> Self {
-        FontStretch::Stretch(NonNegativePercentage::from_computed_value(&NonNegative((computed.0).0)))
+        FontStretch::Stretch(NonNegativePercentage::from_computed_value(&NonNegative(
+            (computed.0).0,
+        )))
     }
 }
 
@@ -723,7 +729,8 @@ impl Parse for FontFamily {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<FontFamily, ParseError<'i>> {
-        let values = input.parse_comma_separated(|input| SingleFontFamily::parse(context, input))?;
+        let values =
+            input.parse_comma_separated(|input| SingleFontFamily::parse(context, input))?;
         Ok(FontFamily::Values(FontFamilyList {
             #[cfg(feature = "gecko")]
             list: crate::ArcSlice::from_iter(values.into_iter()),
@@ -755,9 +762,7 @@ impl Parse for FamilyName {
 }
 
 /// Preserve the readability of text when font fallback occurs
-#[derive(
-    Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem,
-)]
+#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
 #[allow(missing_docs)]
 pub enum FontSizeAdjust {
     Value(GenericFontSizeAdjust<NonNegativeNumber>),
@@ -804,7 +809,9 @@ impl Parse for FontSizeAdjust {
         }
         // Without a basis keyword, the number refers to the 'ex-height' metric.
         let value = NonNegativeNumber::parse(context, input)?;
-        Ok(FontSizeAdjust::Value(GenericFontSizeAdjust::ExHeight(value)))
+        Ok(FontSizeAdjust::Value(GenericFontSizeAdjust::ExHeight(
+            value,
+        )))
     }
 }
 
@@ -1985,14 +1992,7 @@ impl Parse for FontFeatureSettings {
 }
 
 #[derive(
-    Clone,
-    Copy,
-    Debug,
-    MallocSizeOf,
-    PartialEq,
-    ToComputedValue,
-    ToResolvedValue,
-    ToShmem,
+    Clone, Copy, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToResolvedValue, ToShmem,
 )]
 /// Whether user agents are allowed to synthesize bold or oblique font faces
 /// when a font family lacks those faces, or a small-caps variant when this is
@@ -2102,11 +2102,7 @@ impl ToCss for FontSynthesis {
 
 impl SpecifiedValueInfo for FontSynthesis {
     fn collect_completion_keywords(f: KeywordsCollectFn) {
-        f(&[
-            "none",
-            "weight",
-            "style",
-        ]);
+        f(&["none", "weight", "style"]);
         if allow_font_synthesis_small_caps() {
             f(&["small-caps"]);
         }
@@ -2319,7 +2315,9 @@ impl Parse for VariationValue<Number> {
 /// A metrics override value for a @font-face descriptor
 ///
 /// https://drafts.csswg.org/css-fonts/#font-metrics-override-desc
-#[derive(Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
+#[derive(
+    Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToCss, ToShmem,
+)]
 pub enum MetricsOverride {
     /// A non-negative `<percentage>` of the computed font size
     Override(NonNegativePercentage),
diff --git a/components/style/values/specified/gecko.rs b/components/style/values/specified/gecko.rs
index 9b01cc2a6c4..e721add59cf 100644
--- a/components/style/values/specified/gecko.rs
+++ b/components/style/values/specified/gecko.rs
@@ -52,7 +52,9 @@ impl Parse for IntersectionObserverRootMargin {
         use crate::Zero;
         if input.is_exhausted() {
             // If there are zero elements in tokens, set tokens to ["0px"].
-            return Ok(IntersectionObserverRootMargin(Rect::all(LengthPercentage::zero())));
+            return Ok(IntersectionObserverRootMargin(Rect::all(
+                LengthPercentage::zero(),
+            )));
         }
         let rect = Rect::parse_with(context, input, parse_pixel_or_percent)?;
         Ok(IntersectionObserverRootMargin(rect))
diff --git a/components/style/values/specified/image.rs b/components/style/values/specified/image.rs
index 095ce20f4c7..f027c69f03a 100644
--- a/components/style/values/specified/image.rs
+++ b/components/style/values/specified/image.rs
@@ -181,7 +181,13 @@ impl Parse for Image {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Image, ParseError<'i>> {
-        Image::parse_with_cors_mode(context, input, CorsMode::None, /* allow_none = */ true, /* only_url = */ false)
+        Image::parse_with_cors_mode(
+            context,
+            input,
+            CorsMode::None,
+            /* allow_none = */ true,
+            /* only_url = */ false,
+        )
     }
 }
 
@@ -334,7 +340,10 @@ impl CrossFadeImage {
         cors_mode: CorsMode,
     ) -> Result<Self, ParseError<'i>> {
         if let Ok(image) = input.try_parse(|input| {
-            Image::parse_with_cors_mode(context, input, cors_mode, /* allow_none = */ false, /* only_url = */ false)
+            Image::parse_with_cors_mode(
+                context, input, cors_mode, /* allow_none = */ false,
+                /* only_url = */ false,
+            )
         }) {
             return Ok(Self::Image(image));
         }
@@ -374,7 +383,9 @@ impl ImageSet {
             }
         }
         let items = input.parse_nested_block(|input| {
-            input.parse_comma_separated(|input| ImageSetItem::parse(context, input, cors_mode, only_url))
+            input.parse_comma_separated(|input| {
+                ImageSetItem::parse(context, input, cors_mode, only_url)
+            })
         })?;
         Ok(Self {
             selected_index: 0,
@@ -386,9 +397,7 @@ impl ImageSet {
 impl ImageSetItem {
     fn parse_type<'i>(p: &mut Parser<'i, '_>) -> Result<crate::OwnedStr, ParseError<'i>> {
         p.expect_function_matching("type")?;
-        p.parse_nested_block(|input| {
-            Ok(input.expect_string()?.as_ref().to_owned().into())
-        })
+        p.parse_nested_block(|input| Ok(input.expect_string()?.as_ref().to_owned().into()))
     }
 
     fn parse<'i, 't>(
@@ -404,23 +413,33 @@ impl ImageSetItem {
                 cors_mode,
             )),
             Err(..) => Image::parse_with_cors_mode(
-                context, input, cors_mode, /* allow_none = */ false,  /* only_url = */ only_url
+                context, input, cors_mode, /* allow_none = */ false,
+                /* only_url = */ only_url,
             )?,
         };
 
-        let mut resolution = input.try_parse(|input| Resolution::parse(context, input)).ok();
+        let mut resolution = input
+            .try_parse(|input| Resolution::parse(context, input))
+            .ok();
         let mime_type = input.try_parse(Self::parse_type).ok();
 
         // Try to parse resolution after type().
         if mime_type.is_some() && resolution.is_none() {
-            resolution = input.try_parse(|input| Resolution::parse(context, input)).ok();
+            resolution = input
+                .try_parse(|input| Resolution::parse(context, input))
+                .ok();
         }
 
         let resolution = resolution.unwrap_or(Resolution::X(1.0));
         let has_mime_type = mime_type.is_some();
         let mime_type = mime_type.unwrap_or_default();
 
-        Ok(Self { image, resolution, has_mime_type, mime_type })
+        Ok(Self {
+            image,
+            resolution,
+            has_mime_type,
+            mime_type,
+        })
     }
 }
 
diff --git a/components/style/values/specified/mod.rs b/components/style/values/specified/mod.rs
index 8923a868a7c..7cb34ca9a23 100644
--- a/components/style/values/specified/mod.rs
+++ b/components/style/values/specified/mod.rs
@@ -55,7 +55,7 @@ pub use self::font::{FontVariantAlternates, FontWeight};
 pub use self::font::{FontVariantEastAsian, FontVariationSettings};
 pub use self::font::{MathDepth, MozScriptMinSize, MozScriptSizeMultiplier, XLang, XTextZoom};
 pub use self::image::{EndingShape as GradientEndingShape, Gradient};
-pub use self::image::{Image, MozImageRect, ImageRendering};
+pub use self::image::{Image, ImageRendering, MozImageRect};
 pub use self::length::{AbsoluteLength, CalcLengthPercentage, CharacterWidth};
 pub use self::length::{FontRelativeLength, Length, LengthOrNumber, NonNegativeLengthOrNumber};
 pub use self::length::{LengthOrAuto, LengthPercentage, LengthPercentageOrAuto};
@@ -70,7 +70,7 @@ pub use self::list::Quotes;
 pub use self::motion::{OffsetPath, OffsetRotate};
 pub use self::outline::OutlineStyle;
 pub use self::page::{Orientation, PageSize, PaperSize};
-pub use self::percentage::{Percentage, NonNegativePercentage};
+pub use self::percentage::{NonNegativePercentage, Percentage};
 pub use self::position::AspectRatio;
 pub use self::position::{
     GridAutoFlow, GridTemplateAreas, MasonryAutoFlow, Position, PositionOrAuto,
@@ -83,9 +83,9 @@ pub use self::svg::{DProperty, MozContextProperties};
 pub use self::svg::{SVGLength, SVGOpacity, SVGPaint};
 pub use self::svg::{SVGPaintOrder, SVGStrokeDashArray, SVGWidth};
 pub use self::svg_path::SVGPathData;
+pub use self::text::RubyPosition;
 pub use self::text::TextAlignLast;
 pub use self::text::TextUnderlinePosition;
-pub use self::text::RubyPosition;
 pub use self::text::{InitialLetter, LetterSpacing, LineBreak, LineHeight, TextAlign};
 pub use self::text::{OverflowWrap, TextEmphasisPosition, TextEmphasisStyle, WordBreak};
 pub use self::text::{TextAlignKeyword, TextDecorationLine, TextOverflow, WordSpacing};
diff --git a/components/style/values/specified/svg_path.rs b/components/style/values/specified/svg_path.rs
index a443a443326..b251ce900ce 100644
--- a/components/style/values/specified/svg_path.rs
+++ b/components/style/values/specified/svg_path.rs
@@ -85,7 +85,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_MOVETO_ABS),
                     });
                     i = i + 2;
-                }
+                },
                 PATHSEG_LINETO_ABS | PATHSEG_LINETO_REL => {
                     debug_assert!(i + 1 < path.len());
                     result.push(PathCommand::LineTo {
@@ -93,7 +93,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_LINETO_ABS),
                     });
                     i = i + 2;
-                }
+                },
                 PATHSEG_CURVETO_CUBIC_ABS | PATHSEG_CURVETO_CUBIC_REL => {
                     debug_assert!(i + 5 < path.len());
                     result.push(PathCommand::CurveTo {
@@ -103,7 +103,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_CURVETO_CUBIC_ABS),
                     });
                     i = i + 6;
-                }
+                },
                 PATHSEG_CURVETO_QUADRATIC_ABS | PATHSEG_CURVETO_QUADRATIC_REL => {
                     debug_assert!(i + 3 < path.len());
                     result.push(PathCommand::QuadBezierCurveTo {
@@ -112,7 +112,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_CURVETO_QUADRATIC_ABS),
                     });
                     i = i + 4;
-                }
+                },
                 PATHSEG_ARC_ABS | PATHSEG_ARC_REL => {
                     debug_assert!(i + 6 < path.len());
                     result.push(PathCommand::EllipticalArc {
@@ -125,7 +125,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_ARC_ABS),
                     });
                     i = i + 7;
-                }
+                },
                 PATHSEG_LINETO_HORIZONTAL_ABS | PATHSEG_LINETO_HORIZONTAL_REL => {
                     debug_assert!(i < path.len());
                     result.push(PathCommand::HorizontalLineTo {
@@ -133,7 +133,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_LINETO_HORIZONTAL_ABS),
                     });
                     i = i + 1;
-                }
+                },
                 PATHSEG_LINETO_VERTICAL_ABS | PATHSEG_LINETO_VERTICAL_REL => {
                     debug_assert!(i < path.len());
                     result.push(PathCommand::VerticalLineTo {
@@ -141,7 +141,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_LINETO_VERTICAL_ABS),
                     });
                     i = i + 1;
-                }
+                },
                 PATHSEG_CURVETO_CUBIC_SMOOTH_ABS | PATHSEG_CURVETO_CUBIC_SMOOTH_REL => {
                     debug_assert!(i + 3 < path.len());
                     result.push(PathCommand::SmoothCurveTo {
@@ -150,7 +150,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_CURVETO_CUBIC_SMOOTH_ABS),
                     });
                     i = i + 4;
-                }
+                },
                 PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS | PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL => {
                     debug_assert!(i + 1 < path.len());
                     result.push(PathCommand::SmoothQuadBezierCurveTo {
@@ -158,7 +158,7 @@ impl SVGPathData {
                         absolute: IsAbsolute::new(seg_type == PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS),
                     });
                     i = i + 2;
-                }
+                },
                 PATHSEG_UNKNOWN | _ => return Err(()),
             }
         }
diff --git a/components/style/values/specified/text.rs b/components/style/values/specified/text.rs
index ce652734060..893c5232c5e 100644
--- a/components/style/values/specified/text.rs
+++ b/components/style/values/specified/text.rs
@@ -1061,7 +1061,6 @@ impl Default for MozControlCharacterVisibility {
     }
 }
 
-
 /// Values for the `line-break` property.
 #[repr(u8)]
 #[derive(
@@ -1259,15 +1258,7 @@ impl ToCss for TextUnderlinePosition {
 /// Values for `ruby-position` property
 #[repr(u8)]
 #[derive(
-    Clone,
-    Copy,
-    Debug,
-    Eq,
-    MallocSizeOf,
-    PartialEq,
-    ToComputedValue,
-    ToResolvedValue,
-    ToShmem,
+    Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue, ToResolvedValue, ToShmem,
 )]
 #[allow(missing_docs)]
 pub enum RubyPosition {
@@ -1283,7 +1274,9 @@ impl Parse for RubyPosition {
         input: &mut Parser<'i, 't>,
     ) -> Result<RubyPosition, ParseError<'i>> {
         // Parse alternate before
-        let alternate = input.try_parse(|i| i.expect_ident_matching("alternate")).is_ok();
+        let alternate = input
+            .try_parse(|i| i.expect_ident_matching("alternate"))
+            .is_ok();
         if alternate && input.is_exhausted() {
             return Ok(RubyPosition::AlternateOver);
         }
@@ -1294,7 +1287,9 @@ impl Parse for RubyPosition {
         };
         // Parse alternate after
         let alternate = alternate ||
-             input.try_parse(|i| i.expect_ident_matching("alternate")).is_ok();
+            input
+                .try_parse(|i| i.expect_ident_matching("alternate"))
+                .is_ok();
 
         Ok(match (over, alternate) {
             (true, true) => RubyPosition::AlternateOver,
diff --git a/components/style/values/specified/ui.rs b/components/style/values/specified/ui.rs
index 4594cbfcc77..07463efe66a 100644
--- a/components/style/values/specified/ui.rs
+++ b/components/style/values/specified/ui.rs
@@ -11,7 +11,9 @@ use crate::values::specified::image::Image;
 use crate::values::specified::Number;
 use cssparser::Parser;
 use std::fmt::{self, Write};
-use style_traits::{CssWriter, KeywordsCollectFn, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss};
+use style_traits::{
+    CssWriter, KeywordsCollectFn, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss,
+};
 
 /// A specified value for the `cursor` property.
 pub type Cursor = generics::GenericCursor<CursorImage>;