Fix doc comment

Author: scalexm

src/librustc/infer/canonical/canonicalizer.rs

@@ -467,7 +467,7 @@ impl<'cx, 'gcx, 'tcx> Canonicalizer<'cx, 'gcx, 'tcx> {
         let var = self.canonical_var(info, r.into());
         let region = ty::ReLateBound(
             self.binder_index,
-            ty::BoundRegion::BrAnon(var.index() as u32)
+            ty::BoundRegion::BrAnon(var.as_u32())
         );
         self.tcx().mk_region(region)
     }

src/librustc/ty/fold.rs

@@ -539,7 +539,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     }
 
     /// Replace all escaping bound vars. The `fld_r` closure replaces escaping
-    /// bound regions while the `flr_t` closure replaces escaping bound types.
+    /// bound regions while the `fld_t` closure replaces escaping bound types.
     pub fn replace_escaping_bound_vars<T, F, G>(
         self,
         value: &T,
@@ -560,7 +560,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     }
 
     /// Replace all types or regions bound by the given `Binder`. The `fld_r`
-    /// closure replaces bound regions while the `flr_t` closure replaces bound
+    /// closure replaces bound regions while the `fld_t` closure replaces bound
     /// types.
     pub fn replace_bound_vars<T, F, G>(
         self,