diff --git a/components/layout/traversal.rs b/components/layout/traversal.rs
index 78cb8d741f3..2d85ce23c9b 100644
--- a/components/layout/traversal.rs
+++ b/components/layout/traversal.rs
@@ -47,14 +47,19 @@ impl<'a> RecalcStyleAndConstructFlows<'a> {
 
 #[allow(unsafe_code)]
 impl<'a, E> DomTraversal<E> for RecalcStyleAndConstructFlows<'a>
-    where E: TElement,
-          E::ConcreteNode: LayoutNode,
-          E::FontMetricsProvider: Send,
+where
+    E: TElement,
+    E::ConcreteNode: LayoutNode,
+    E::FontMetricsProvider: Send,
 {
-    fn process_preorder<F>(&self, traversal_data: &PerLevelTraversalData,
-                           context: &mut StyleContext<E>, node: E::ConcreteNode,
-                           note_child: F)
-        where F: FnMut(E::ConcreteNode)
+    fn process_preorder<F>(
+        &self,
+        traversal_data: &PerLevelTraversalData,
+        context: &mut StyleContext<E>, node: E::ConcreteNode,
+        note_child: F,
+    )
+    where
+        F: FnMut(E::ConcreteNode)
     {
         // FIXME(pcwalton): Stop allocating here. Ideally this should just be
         // done by the HTML parser.
diff --git a/components/style/context.rs b/components/style/context.rs
index 6a970d6d3fb..e6a7b544ab0 100644
--- a/components/style/context.rs
+++ b/components/style/context.rs
@@ -384,8 +384,9 @@ impl fmt::Display for TraversalStatistics {
 impl TraversalStatistics {
     /// Computes the traversal time given the start time in seconds.
     pub fn finish<E, D>(&mut self, traversal: &D, parallel: bool, start: f64)
-    where E: TElement,
-          D: DomTraversal<E>,
+    where
+        E: TElement,
+        D: DomTraversal<E>,
     {
         let threshold = traversal.shared_context().options.style_statistics_threshold;
         let stylist = traversal.shared_context().stylist;
diff --git a/components/style/invalidation/element/element_wrapper.rs b/components/style/invalidation/element/element_wrapper.rs
index 6e649588bb2..5483c275697 100644
--- a/components/style/invalidation/element/element_wrapper.rs
+++ b/components/style/invalidation/element/element_wrapper.rs
@@ -135,7 +135,8 @@ where
 }
 
 impl<'a, E> fmt::Debug for ElementWrapper<'a, E>
-    where E: TElement,
+where
+    E: TElement,
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         // Ignore other fields for now, can change later if needed.
@@ -144,7 +145,8 @@ impl<'a, E> fmt::Debug for ElementWrapper<'a, E>
 }
 
 impl<'a, E> Element for ElementWrapper<'a, E>
-    where E: TElement,
+where
+    E: TElement,
 {
     type Impl = SelectorImpl;
 
diff --git a/components/style/parallel.rs b/components/style/parallel.rs
index d7604a6a5cf..fd2ca7bc3a9 100644
--- a/components/style/parallel.rs
+++ b/components/style/parallel.rs
@@ -77,9 +77,11 @@ type WorkUnit<N> = ArrayVec<[SendNode<N>; WORK_UNIT_MAX]>;
 #[inline(never)]
 fn create_thread_local_context<'scope, E, D>(
     traversal: &'scope D,
-    slot: &mut Option<ThreadLocalStyleContext<E>>)
-    where E: TElement + 'scope,
-          D: DomTraversal<E>
+    slot: &mut Option<ThreadLocalStyleContext<E>>,
+)
+where
+    E: TElement + 'scope,
+    D: DomTraversal<E>,
 {
     *slot = Some(ThreadLocalStyleContext::new(traversal.shared_context()));
 }
@@ -99,15 +101,18 @@ fn create_thread_local_context<'scope, E, D>(
 ///   a thread-local cache to share styles between siblings.
 #[inline(always)]
 #[allow(unsafe_code)]
-fn top_down_dom<'a, 'scope, E, D>(nodes: &'a [SendNode<E::ConcreteNode>],
-                                  root: OpaqueNode,
-                                  mut traversal_data: PerLevelTraversalData,
-                                  scope: &'a rayon::Scope<'scope>,
-                                  pool: &'scope rayon::ThreadPool,
-                                  traversal: &'scope D,
-                                  tls: &'scope ScopedTLS<'scope, ThreadLocalStyleContext<E>>)
-    where E: TElement + 'scope,
-          D: DomTraversal<E>,
+fn top_down_dom<'a, 'scope, E, D>(
+    nodes: &'a [SendNode<E::ConcreteNode>],
+    root: OpaqueNode,
+    mut traversal_data: PerLevelTraversalData,
+    scope: &'a rayon::Scope<'scope>,
+    pool: &'scope rayon::ThreadPool,
+    traversal: &'scope D,
+    tls: &'scope ScopedTLS<'scope, ThreadLocalStyleContext<E>>,
+)
+where
+    E: TElement + 'scope,
+    D: DomTraversal<E>,
 {
     debug_assert!(nodes.len() <= WORK_UNIT_MAX);
 
diff --git a/components/style/rule_tree/mod.rs b/components/style/rule_tree/mod.rs
index 0ff2dbf28dc..040a93d9a45 100644
--- a/components/style/rule_tree/mod.rs
+++ b/components/style/rule_tree/mod.rs
@@ -1096,14 +1096,16 @@ impl StrongRuleNode {
     /// Returns true if any properties specified by `rule_type_mask` was set by
     /// an author rule.
     #[cfg(feature = "gecko")]
-    pub fn has_author_specified_rules<E>(&self,
-                                         mut element: E,
-                                         mut pseudo: Option<PseudoElement>,
-                                         guards: &StylesheetGuards,
-                                         rule_type_mask: u32,
-                                         author_colors_allowed: bool)
-        -> bool
-        where E: ::dom::TElement
+    pub fn has_author_specified_rules<E>(
+        &self,
+        mut element: E,
+        mut pseudo: Option<PseudoElement>,
+        guards: &StylesheetGuards,
+        rule_type_mask: u32,
+        author_colors_allowed: bool,
+    ) -> bool
+    where
+        E: ::dom::TElement
     {
         use gecko_bindings::structs::NS_AUTHOR_SPECIFIED_BACKGROUND;
         use gecko_bindings::structs::NS_AUTHOR_SPECIFIED_BORDER;