Fix test stderr after tidying the source

src/test/ui/rfc1598-generic-associated-types/collections.stderr

@@ -1,29 +1,29 @@
 error[E0109]: type parameters are not allowed on this type
-  --> $DIR/collections.rs:57:90
+  --> $DIR/collections.rs:59:90
    |
 LL | fn floatify<C>(ints: &C) -> <<C as Collection<i32>>::Family as CollectionFamily>::Member<f32>
    |                                                                                          ^^^ type parameter not allowed
 
 error[E0109]: type parameters are not allowed on this type
-  --> $DIR/collections.rs:67:69
+  --> $DIR/collections.rs:69:69
    |
 LL | fn floatify_sibling<C>(ints: &C) -> <C as Collection<i32>>::Sibling<f32>
    |                                                                     ^^^ type parameter not allowed
 
 error[E0110]: lifetime parameters are not allowed on this type
-  --> $DIR/collections.rs:23:50
+  --> $DIR/collections.rs:24:50
    |
 LL |     fn iterate<'iter>(&'iter self) -> Self::Iter<'iter>;
    |                                                  ^^^^^ lifetime parameter not allowed on this type
 
 error[E0109]: type parameters are not allowed on this type
-  --> $DIR/collections.rs:28:100
+  --> $DIR/collections.rs:30:16
    |
-LL |     type Sibling<U>: Collection<U> = <<Self as Collection<T>>::Family as CollectionFamily>::Member<U>;
-   |                                                                                                    ^ type parameter not allowed
+LL |         Member<U>;
+   |                ^ type parameter not allowed
 
 error[E0110]: lifetime parameters are not allowed on this type
-  --> $DIR/collections.rs:49:50
+  --> $DIR/collections.rs:51:50
    |
 LL |     fn iterate<'iter>(&'iter self) -> Self::Iter<'iter> {
    |                                                  ^^^^^ lifetime parameter not allowed on this type