Rollup merge of #83980 - pierwill:fix-compiler-librustc-names, r=davidtwco

Fix outdated crate names in compiler docs

Changes `librustc_X` to `rustc_X`, only in documentation comments.
Plain code comments are left unchanged.

compiler/rustc_hir/src/stable_hash_impls.rs

@@ -9,7 +9,7 @@ use rustc_span::def_id::{DefPathHash, LocalDefId};
 
 /// Requirements for a `StableHashingContext` to be used in this crate.
 /// This is a hack to allow using the `HashStable_Generic` derive macro
-/// instead of implementing everything in librustc_middle.
+/// instead of implementing everything in `rustc_middle`.
 pub trait HashStableContext:
     rustc_ast::HashStableContext + rustc_target::HashStableContext
 {

compiler/rustc_hir/src/weak_lang_items.rs

@@ -18,8 +18,8 @@ pub static WEAK_ITEMS_REFS: SyncLazy<StableMap<Symbol, LangItem>> = SyncLazy::ne
     map
 });
 
-/// The `check_name` argument avoids the need for `librustc_hir` to depend on
-/// `librustc_session`.
+/// The `check_name` argument avoids the need for `rustc_hir` to depend on
+/// `rustc_session`.
 pub fn link_name<'a, F>(check_name: F, attrs: &'a [ast::Attribute]) -> Option<Symbol>
 where
     F: Fn(&'a ast::Attribute, Symbol) -> bool