consistency rename: language item -> lang item

compiler/rustc_passes/src/weak_lang_items.rs

@@ -14,7 +14,7 @@ use crate::errors::{
 };
 
 /// Checks the crate for usage of weak lang items, returning a vector of all the
-/// language items required by this crate, but not defined yet.
+/// lang items required by this crate, but not defined yet.
 pub fn check_crate(tcx: TyCtxt<'_>, items: &mut lang_items::LanguageItems, krate: &ast::Crate) {
     // These are never called by user code, they're generated by the compiler.
     // They will never implicitly be added to the `missing` array unless we do