Comment tweaks

src/librustc/query/mod.rs

@@ -43,7 +43,7 @@ rustc_queries! {
     }
 
     Other {
-        // Represents crate as a whole (as distinct from the to-level crate module).
+        // Represents crate as a whole (as distinct from the top-level crate module).
         // If you call `hir_crate` (e.g., indirectly by calling `tcx.hir().krate()`),
         // we will have to assume that any change means that you need to be recompiled.
         // This is because the `hir_crate` query gives you access to all other items.

src/librustc/ty/context.rs

@@ -966,6 +966,7 @@ pub struct GlobalCtxt<'tcx> {
     /// Export map produced by name resolution.
     export_map: FxHashMap<DefId, Vec<Export<hir::HirId>>>,
 
+    /// This should usually be accessed with the `tcx.hir()` method.
     pub(crate) hir_map: hir_map::Map<'tcx>,
 
     /// A map from `DefPathHash` -> `DefId`. Includes `DefId`s from the local crate