improve wording: bounds -> generic bounds

Author: RalfJung

src/librustc_typeck/collect.rs

@@ -383,7 +383,7 @@ fn ensure_no_param_bounds(tcx: TyCtxt,
         // part of this PR. Still, convert to warning to
         // make bootstrapping easier.
         span_warn!(tcx.sess, span, E0122,
-                   "bounds are ignored in {}",
+                   "generic bounds are ignored in {}",
                    thing);
     }
 }

src/test/ui/param-bounds-ignored.stderr

@@ -1,16 +1,16 @@
-warning[E0122]: bounds are ignored in type aliases
+warning[E0122]: generic bounds are ignored in type aliases
   --> $DIR/param-bounds-ignored.rs:15:1
    |
 15 | type SVec<T: Send> = Vec<T>;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-warning[E0122]: bounds are ignored in type aliases
+warning[E0122]: generic bounds are ignored in type aliases
   --> $DIR/param-bounds-ignored.rs:16:1
    |
 16 | type VVec<'b, 'a: 'b> = Vec<&'a i32>;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-warning[E0122]: bounds are ignored in type aliases
+warning[E0122]: generic bounds are ignored in type aliases
   --> $DIR/param-bounds-ignored.rs:17:1
    |
 17 | type WVec<'b, T: 'b> = Vec<T>;