test fixes

Author: Ariel Ben-Yehuda

src/test/compile-fail/assoc-inherent.rs

@@ -13,7 +13,7 @@
 struct Foo;
 
 impl Foo {
-    type Bar = isize; //~ERROR associated items are not allowed in inherent impls
+    type Bar = isize; //~ERROR associated types are not allowed in inherent impls
 }
 
 fn main() {}

src/test/compile-fail/issue-22673.rs

@@ -10,7 +10,7 @@
 
 trait Expr : PartialEq<Self::Item> {
     //~^ ERROR: unsupported cyclic reference between types/traits detected
-    type Item = Expr;
+    type Item;
 }
 
 fn main() {}