diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index 6d509cf6903..8fa2258eaaf 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -85,7 +85,9 @@ impl Device {
         assert!(!pres_context.is_null());
         Device {
             pres_context,
-            default_values: ComputedValues::default_values(unsafe { &*(*pres_context).mDocument.mRawPtr }),
+            default_values: ComputedValues::default_values(unsafe {
+                &*(*pres_context).mDocument.mRawPtr
+            }),
             // FIXME(bz): Seems dubious?
             root_font_size: AtomicIsize::new(FontSize::medium().size().0 as isize),
             body_text_color: AtomicUsize::new(unsafe { &*pres_context }.mDefaultColor as usize),
diff --git a/components/style/gecko_bindings/sugar/style_complex_color.rs b/components/style/gecko_bindings/sugar/style_complex_color.rs
index 69565950b3e..aec334969d4 100644
--- a/components/style/gecko_bindings/sugar/style_complex_color.rs
+++ b/components/style/gecko_bindings/sugar/style_complex_color.rs
@@ -8,7 +8,9 @@ use crate::gecko::values::{convert_nscolor_to_rgba, convert_rgba_to_nscolor};
 use crate::gecko_bindings::structs::StyleComplexColor;
 use crate::gecko_bindings::structs::StyleComplexColor_Tag as Tag;
 use crate::values::computed::{Color as ComputedColor, ColorOrAuto, RGBAColor as ComputedRGBA};
-use crate::values::generics::color::{Color as GenericColor, ColorOrAuto as GenericColorOrAuto, ComplexColorRatios};
+use crate::values::generics::color::{
+    Color as GenericColor, ColorOrAuto as GenericColorOrAuto, ComplexColorRatios,
+};
 
 impl StyleComplexColor {
     /// Create a `StyleComplexColor` value that represents `currentColor`.
diff --git a/components/style/values/computed/length.rs b/components/style/values/computed/length.rs
index 45a0d941ff0..f578bbbd5ce 100644
--- a/components/style/values/computed/length.rs
+++ b/components/style/values/computed/length.rs
@@ -9,7 +9,9 @@ use crate::values::animated::ToAnimatedValue;
 use crate::values::computed::NonNegativeNumber;
 use crate::values::distance::{ComputeSquaredDistance, SquaredDistance};
 use crate::values::generics::length as generics;
-use crate::values::generics::length::{MaxSize as GenericMaxSize, Size as GenericSize, GenericLengthOrNumber};
+use crate::values::generics::length::{
+    GenericLengthOrNumber, MaxSize as GenericMaxSize, Size as GenericSize,
+};
 use crate::values::generics::transform::IsZeroLength;
 use crate::values::generics::NonNegative;
 use crate::values::specified::length::ViewportPercentageLength;
diff --git a/components/style/values/computed/transform.rs b/components/style/values/computed/transform.rs
index a78cda03ec0..dd3fe20754c 100644
--- a/components/style/values/computed/transform.rs
+++ b/components/style/values/computed/transform.rs
@@ -21,7 +21,8 @@ pub type TransformOperation =
 pub type Transform = generic::Transform<TransformOperation>;
 
 /// The computed value of a CSS `<transform-origin>`
-pub type TransformOrigin = generic::GenericTransformOrigin<LengthPercentage, LengthPercentage, Length>;
+pub type TransformOrigin =
+    generic::GenericTransformOrigin<LengthPercentage, LengthPercentage, Length>;
 
 /// A vector to represent the direction vector (rotate axis) for Rotate3D.
 pub type DirectionVector = Vector3D<CSSFloat>;
diff --git a/components/style/values/generics/background.rs b/components/style/values/generics/background.rs
index c133f0c8b85..14ac9744b14 100644
--- a/components/style/values/generics/background.rs
+++ b/components/style/values/generics/background.rs
@@ -4,7 +4,7 @@
 
 //! Generic types for CSS values related to backgrounds.
 
-use crate::values::generics::length::{LengthPercentageOrAuto, GenericLengthPercentageOrAuto};
+use crate::values::generics::length::{GenericLengthPercentageOrAuto, LengthPercentageOrAuto};
 use std::fmt::{self, Write};
 use style_traits::{CssWriter, ToCss};
 
diff --git a/components/style/values/generics/mod.rs b/components/style/values/generics/mod.rs
index 5de31317935..737c88e7ba7 100644
--- a/components/style/values/generics/mod.rs
+++ b/components/style/values/generics/mod.rs
@@ -127,8 +127,8 @@ impl Parse for CounterStyleOrNone {
             let symbols = Symbols::parse(context, input)?;
             // There must be at least two symbols for alphabetic or
             // numeric system.
-            if (symbols_type == SymbolsType::Alphabetic ||
-                symbols_type == SymbolsType::Numeric) && symbols.0.len() < 2
+            if (symbols_type == SymbolsType::Alphabetic || symbols_type == SymbolsType::Numeric) &&
+                symbols.0.len() < 2
             {
                 return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
             }
@@ -177,7 +177,7 @@ impl SpecifiedValueInfo for CounterStyleOrNone {
 #[repr(transparent)]
 pub struct NonNegative<T>(pub T);
 
-impl <T: Add<Output = T>> Add<NonNegative<T>> for NonNegative<T> {
+impl<T: Add<Output = T>> Add<NonNegative<T>> for NonNegative<T> {
     type Output = Self;
 
     fn add(self, other: Self) -> Self {
@@ -185,7 +185,7 @@ impl <T: Add<Output = T>> Add<NonNegative<T>> for NonNegative<T> {
     }
 }
 
-impl <T: Zero> Zero for NonNegative<T> {
+impl<T: Zero> Zero for NonNegative<T> {
     fn is_zero(&self) -> bool {
         self.0.is_zero()
     }
diff --git a/components/style/values/generics/position.rs b/components/style/values/generics/position.rs
index 3eae408164d..34034b7d5b7 100644
--- a/components/style/values/generics/position.rs
+++ b/components/style/values/generics/position.rs
@@ -32,7 +32,10 @@ pub use self::GenericPosition as Position;
 impl<H, V> Position<H, V> {
     /// Returns a new position.
     pub fn new(horizontal: H, vertical: V) -> Self {
-        Self { horizontal, vertical }
+        Self {
+            horizontal,
+            vertical,
+        }
     }
 }
 
diff --git a/components/style/values/generics/transform.rs b/components/style/values/generics/transform.rs
index 6c98a45dd6c..6c60e76cbf6 100644
--- a/components/style/values/generics/transform.rs
+++ b/components/style/values/generics/transform.rs
@@ -98,7 +98,11 @@ pub use self::GenericTransformOrigin as TransformOrigin;
 impl<H, V, D> TransformOrigin<H, V, D> {
     /// Returns a new transform origin.
     pub fn new(horizontal: H, vertical: V, depth: D) -> Self {
-        Self { horizontal, vertical, depth }
+        Self {
+            horizontal,
+            vertical,
+            depth,
+        }
     }
 }
 
diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index 4b39c6e1a2e..02238bf13db 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -419,16 +419,7 @@ pub enum ScrollSnapAlignKeyword {
 /// https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-align
 #[allow(missing_docs)]
 #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-#[derive(
-    Clone,
-    Copy,
-    Debug,
-    Eq,
-    MallocSizeOf,
-    PartialEq,
-    SpecifiedValueInfo,
-    ToComputedValue,
-)]
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToComputedValue)]
 #[repr(C)]
 pub struct ScrollSnapAlign {
     block: ScrollSnapAlignKeyword,
diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index 57725294808..0344af275ce 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -17,7 +17,7 @@ use crate::values::generics::font::{KeywordSize, VariationValue};
 use crate::values::generics::NonNegative;
 use crate::values::specified::length::{FontBaseSize, AU_PER_PT, AU_PER_PX};
 use crate::values::specified::{AllowQuirks, Angle, Integer, LengthPercentage};
-use crate::values::specified::{NoCalcLength, Number, NonNegativeNumber, Percentage};
+use crate::values::specified::{NoCalcLength, NonNegativeNumber, Number, Percentage};
 use crate::values::CustomIdent;
 use crate::Atom;
 use app_units::Au;
diff --git a/components/style/values/specified/length.rs b/components/style/values/specified/length.rs
index 78e699ac042..a8cae981993 100644
--- a/components/style/values/specified/length.rs
+++ b/components/style/values/specified/length.rs
@@ -11,11 +11,13 @@ use crate::font_metrics::FontMetricsQueryResult;
 use crate::parser::{Parse, ParserContext};
 use crate::values::computed::{self, CSSPixelLength, Context};
 use crate::values::generics::length as generics;
-use crate::values::generics::length::{MaxSize as GenericMaxSize, Size as GenericSize, GenericLengthOrNumber};
+use crate::values::generics::length::{
+    GenericLengthOrNumber, MaxSize as GenericMaxSize, Size as GenericSize,
+};
 use crate::values::generics::transform::IsZeroLength;
 use crate::values::generics::NonNegative;
-use crate::values::specified::NonNegativeNumber;
 use crate::values::specified::calc::CalcNode;
+use crate::values::specified::NonNegativeNumber;
 use crate::values::{Auto, CSSFloat, Either, Normal};
 use app_units::Au;
 use cssparser::{Parser, Token};
diff --git a/components/style/values/specified/mod.rs b/components/style/values/specified/mod.rs
index de898b35fba..4956d53f177 100644
--- a/components/style/values/specified/mod.rs
+++ b/components/style/values/specified/mod.rs
@@ -19,10 +19,10 @@ use crate::values::serialize_atom_identifier;
 use crate::values::specified::calc::CalcNode;
 use crate::{Atom, Namespace, Prefix};
 use cssparser::{Parser, Token};
-use num_traits::{Zero, One};
+use num_traits::{One, Zero};
 use std::f32;
-use std::ops::Add;
 use std::fmt::{self, Write};
+use std::ops::Add;
 use style_traits::values::specified::AllowedNumericType;
 use style_traits::{CssWriter, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss};
 
diff --git a/components/style/values/specified/svg.rs b/components/style/values/specified/svg.rs
index d2d8dd13798..98db273e61c 100644
--- a/components/style/values/specified/svg.rs
+++ b/components/style/values/specified/svg.rs
@@ -64,7 +64,7 @@ impl Parse for SVGStrokeDashArray {
                 NonNegativeSvgLengthPercentageOrNumber::parse(context, i)
             })
         }) {
-            return Ok(generic::SVGStrokeDashArray::Values(values))
+            return Ok(generic::SVGStrokeDashArray::Values(values));
         }
 
         try_match_ident_ignore_ascii_case! { input,
diff --git a/components/style/values/specified/text.rs b/components/style/values/specified/text.rs
index 60f70537878..1879dc4159a 100644
--- a/components/style/values/specified/text.rs
+++ b/components/style/values/specified/text.rs
@@ -14,9 +14,9 @@ use crate::values::computed::{Context, ToComputedValue};
 use crate::values::generics::text::InitialLetter as GenericInitialLetter;
 use crate::values::generics::text::LineHeight as GenericLineHeight;
 use crate::values::generics::text::Spacing;
+use crate::values::specified::length::NonNegativeLengthPercentage;
 use crate::values::specified::length::{FontRelativeLength, Length};
 use crate::values::specified::length::{LengthPercentage, NoCalcLength};
-use crate::values::specified::length::{NonNegativeLengthPercentage};
 use crate::values::specified::{AllowQuirks, Integer, NonNegativeNumber, Number};
 use cssparser::{Parser, Token};
 use selectors::parser::SelectorParseErrorKind;
diff --git a/components/style_derive/parse.rs b/components/style_derive/parse.rs
index 6dc7de21890..b9b7ae37e1c 100644
--- a/components/style_derive/parse.rs
+++ b/components/style_derive/parse.rs
@@ -70,12 +70,14 @@ pub fn derive(mut input: DeriveInput) -> TokenStream {
     {
         let mut where_clause = input.generics.where_clause.take();
         for param in input.generics.type_params() {
-            cg::add_predicate(&mut where_clause, parse_quote!(#param: crate::parser::Parse));
+            cg::add_predicate(
+                &mut where_clause,
+                parse_quote!(#param: crate::parser::Parse),
+            );
         }
         input.generics.where_clause = where_clause;
     }
 
-
     let name = &input.ident;
     let s = Structure::new(&input);
 
@@ -140,13 +142,8 @@ pub fn derive(mut input: DeriveInput) -> TokenStream {
     let mut parse_non_keywords = quote! {};
     for (i, (variant, css_attrs, parse_attrs)) in non_keywords.iter().enumerate() {
         let skip_try = !has_keywords && i == non_keywords.len() - 1;
-        let parse_variant = parse_non_keyword_variant(
-            name,
-            variant,
-            css_attrs,
-            parse_attrs,
-            skip_try,
-        );
+        let parse_variant =
+            parse_non_keyword_variant(name, variant, css_attrs, parse_attrs, skip_try);
         parse_non_keywords.extend(parse_variant);
     }