Fixed nits raised in review.

src/librustc/hir/mod.rs

@@ -2143,7 +2143,7 @@ pub enum UseKind {
     ListStem,
 }
 
-/// `TraitRef` are references to traits in impls.
+/// References to traits in impls.
 ///
 /// `resolve` maps each `TraitRef`'s `ref_id` to its defining trait; that's all
 /// that the `ref_id` is for. Note that `ref_id`'s value is not the `NodeId` of the

src/librustc/infer/outlives/verify.rs

@@ -141,9 +141,9 @@ impl<'cx, 'gcx, 'tcx> VerifyBoundCx<'cx, 'gcx, 'tcx> {
     }
 
     fn recursive_type_bound(&self, ty: Ty<'tcx>) -> VerifyBound<'tcx> {
-        let mut bounds: Vec<_> = ty.walk_shallow()
+        let mut bounds = ty.walk_shallow()
             .map(|subty| self.type_bound(subty))
-            .collect();
+            .collect::<Vec<_>>();
 
         let mut regions = smallvec![];
         ty.push_regions(&mut regions);

src/librustc/query/mod.rs

@@ -248,12 +248,12 @@ rustc_queries! {
             desc { "computing the variances for items in this crate" }
         }
 
-        /// Maps from def-ID of a type or region parameter to its (inferred) variance.
+        /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
         query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
     }
 
     TypeChecking {
-        /// Maps from def-ID of a type to its (inferred) outlives.
+        /// Maps from thee `DefId` of a type to its (inferred) outlives.
         query inferred_outlives_crate(_: CrateNum)
             -> Lrc<ty::CratePredicatesMap<'tcx>> {
             desc { "computing the inferred outlives predicates for items in this crate" }
@@ -261,7 +261,7 @@ rustc_queries! {
     }
 
     Other {
-        /// Maps from an impl/trait def-ID to a list of the def-ids of its items.
+        /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
         query associated_item_def_ids(_: DefId) -> Lrc<Vec<DefId>> {}
 
         /// Maps from a trait item to the trait item "descriptor".
@@ -274,7 +274,7 @@ rustc_queries! {
     }
 
     TypeChecking {
-        /// Maps a def-ID of a type to a list of its inherent impls.
+        /// Maps a `DefId` of a type to a list of its inherent impls.
         /// Contains implementations of methods that are inherent to a type.
         /// Methods in these implementations don't need to be exported.
         query inherent_impls(_: DefId) -> Lrc<Vec<DefId>> {

src/librustc_save_analysis/dump_visitor.rs

@@ -1216,7 +1216,7 @@ impl<'l, 'tcx: 'l, 'll, O: DumpOutput + 'll> DumpVisitor<'l, 'tcx, 'll, O> {
         let hir_id = self.tcx.hir().node_to_hir_id(id);
         let access = access_from!(self.save_ctxt, root_item, hir_id);
 
-        // The parent def-ID of a given use tree is always the enclosing item.
+        // The parent `DefId` of a given use tree is always the enclosing item.
         let parent = self.save_ctxt.tcx.hir().opt_local_def_id(id)
             .and_then(|id| self.save_ctxt.tcx.parent(id))
             .map(id_from_def_id);

src/librustc_typeck/astconv.rs

@@ -702,7 +702,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> dyn AstConv<'gcx, 'tcx> + 'o {
     }
 
     /// Instantiates the path for the given trait reference, assuming that it's
-    /// bound to a valid trait type. Returns the def-ID for the defining trait.
+    /// bound to a valid trait type. Returns the `DefId` of the defining trait.
     /// The type _cannot_ be a type other than a trait type.
     ///
     /// If the `projections` argument is `None`, then assoc type bindings like `Foo<T = X>`
@@ -994,7 +994,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> dyn AstConv<'gcx, 'tcx> + 'o {
 
         // Expand trait aliases recursively and check that only one regular (non-auto) trait
         // is used and no 'maybe' bounds are used.
-        let expanded_traits = traits::expand_trait_aliases(tcx, bound_trait_refs.clone());
+        let expanded_traits = traits::expand_trait_aliases(tcx, bound_trait_refs.iter().cloned());
         let (mut auto_traits, regular_traits): (Vec<_>, Vec<_>) =
             expanded_traits.partition(|i| tcx.trait_is_auto(i.trait_ref().def_id()));
         if regular_traits.len() > 1 {
@@ -1240,7 +1240,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> dyn AstConv<'gcx, 'tcx> + 'o {
     }
 
     // Search for a bound on a type parameter which includes the associated item
-    // given by `assoc_name`. `ty_param_def_id` is the `DefId` for the type parameter
+    // given by `assoc_name`. `ty_param_def_id` is the `DefId` of the type parameter
     // This function will fail if there are no suitable bounds or there is
     // any ambiguity.
     fn find_bound_for_assoc_item(&self,

src/librustc_typeck/collect.rs

@@ -713,9 +713,9 @@ fn super_predicates_of<'a, 'tcx>(
 
     let superbounds1 = superbounds1.predicates(tcx, self_param_ty);
 
-    // Convert any explicit superbounds in the wheree-clause,
+    // Convert any explicit superbounds in the where-clause,
     // e.g., `trait Foo where Self: Bar`.
-    // In the case of trait aliases, however, we include all bounds in the where clause,
+    // In the case of trait aliases, however, we include all bounds in the where-clause,
     // so e.g., `trait Foo = where u32: PartialEq<Self>` would include `u32: PartialEq<Self>`
     // as one of its "superpredicates".
     let is_trait_alias = tcx.is_trait_alias(trait_def_id);