review comments: wording

src/libsyntax/parse/parser/generics.rs

@@ -107,7 +107,7 @@ impl<'a> Parser<'a> {
                     Ok(where_predicate) => {
                         self.struct_span_err(
                             where_predicate.span(),
-                            "associated type bounds do not belong here",
+                            "bounds on associated types do not belong here",
                         )
                         .span_label(where_predicate.span(), "belongs in `where` clause")
                         .emit();

src/test/ui/parser/assoc-type-in-type-arg.rs

@@ -3,7 +3,7 @@ trait Tr {
 }
 
 struct Bar<'a, Item: Tr, <Item as Tr>::TrSubtype: 'a> {
-    //~^ ERROR associated type bounds do not belong here
+    //~^ ERROR bounds on associated types do not belong here
     item: Item,
     item_sub: &'a <Item as Tr>::TrSubtype,
 }

src/test/ui/parser/assoc-type-in-type-arg.stderr

@@ -1,4 +1,4 @@
-error: associated type bounds do not belong here
+error: bounds on associated types do not belong here
   --> $DIR/assoc-type-in-type-arg.rs:5:26
    |
 LL | struct Bar<'a, Item: Tr, <Item as Tr>::TrSubtype: 'a> {