Clarify what the lexical resolutions are in resolve_path

Author: Manishearth

src/librustc_resolve/lib.rs

@@ -3322,7 +3322,9 @@ impl<'a> Resolver<'a> {
                     .map(MacroBinding::binding)
             } else {
                 match self.resolve_ident_in_lexical_scope(ident, ns, record_used, path_span) {
+                    // we found a locally-imported or available item/module
                     Some(LexicalScopeBinding::Item(binding)) => Ok(binding),
+                    // we found a local variable or type param
                     Some(LexicalScopeBinding::Def(def))
                             if opt_ns == Some(TypeNS) || opt_ns == Some(ValueNS) => {
                         return PathResult::NonModule(PathResolution::with_unresolved_segments(