Remove double spaces after dots in comments

compiler/rustc_hir_analysis/src/lib.rs

@@ -22,7 +22,7 @@ several major phases:
 4. Finally, the check phase then checks function bodies and so forth.
    Within the check phase, we check each function body one at a time
    (bodies of function expressions are checked as part of the
-   containing function).  Inference is used to supply types wherever
+   containing function). Inference is used to supply types wherever
    they are unknown. The actual checking of a function itself has
    several phases (check, regionck, writeback), as discussed in the
    documentation for the [`check`] module.
@@ -46,7 +46,7 @@ independently:
   local variables, type parameters, etc as necessary.
 
 - infer: finds the types to use for each type variable such that
-  all subtyping and assignment constraints are met.  In essence, the check
+  all subtyping and assignment constraints are met. In essence, the check
   module specifies the constraints, and the infer module solves them.
 
 ## Note
@@ -542,7 +542,7 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
 pub fn hir_ty_to_ty<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: &hir::Ty<'_>) -> Ty<'tcx> {
     // In case there are any projections, etc., find the "environment"
     // def-ID that will be used to determine the traits/predicates in
-    // scope.  This is derived from the enclosing item-like thing.
+    // scope. This is derived from the enclosing item-like thing.
     let env_def_id = tcx.hir().get_parent_item(hir_ty.hir_id);
     let item_cx = self::collect::ItemCtxt::new(tcx, env_def_id.to_def_id());
     item_cx.astconv().ast_ty_to_ty(hir_ty)
@@ -555,7 +555,7 @@ pub fn hir_trait_to_predicates<'tcx>(
 ) -> Bounds<'tcx> {
     // In case there are any projections, etc., find the "environment"
     // def-ID that will be used to determine the traits/predicates in
-    // scope.  This is derived from the enclosing item-like thing.
+    // scope. This is derived from the enclosing item-like thing.
     let env_def_id = tcx.hir().get_parent_item(hir_trait.hir_ref_id);
     let item_cx = self::collect::ItemCtxt::new(tcx, env_def_id.to_def_id());
     let mut bounds = Bounds::default();