refactor(rustc_middle): Substs -> GenericArg

compiler/rustc_resolve/src/late.rs

@@ -1361,7 +1361,7 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
 
     fn visit_generic_params(&mut self, params: &'ast [GenericParam], add_self_upper: bool) {
         // For type parameter defaults, we have to ban access
-        // to following type parameters, as the InternalSubsts can only
+        // to following type parameters, as the GenericArgs can only
         // provide previous type parameters as they're built. We
         // put all the parameters on the ban list and then remove
         // them one by one as they are processed and become available.