Parse fail test fixes

Author: aturon

src/test/parse-fail/issue-20711-2.rs

@@ -16,6 +16,6 @@ impl Foo {
     fn foo() {}
 
     #[stable(feature = "rust1", since = "1.0.0")]
-} //~ ERROR expected one of `const`, `extern`, `fn`, `pub`, `type`, or `unsafe`, found `}`
+} //~ ERROR expected one of `const`, `default`, `extern`, `fn`, `pub`, `type`, or `unsafe`
 
 fn main() {}

src/test/parse-fail/issue-20711.rs

@@ -14,6 +14,6 @@ struct Foo;
 
 impl Foo {
     #[stable(feature = "rust1", since = "1.0.0")]
-} //~ ERROR expected one of `const`, `extern`, `fn`, `pub`, `type`, or `unsafe`, found `}`
+} //~ ERROR expected one of `const`, `default`, `extern`, `fn`, `pub`, `type`, or `unsafe`
 
 fn main() {}

src/test/parse-fail/removed-syntax-static-fn.rs

@@ -15,4 +15,4 @@ struct S;
 impl S {
     static fn f() {}
 }
-//~^^ ERROR expected one of `const`, `extern`, `fn`, `pub`, `type`, `unsafe`, or `}`, found `static`
+//~^^ ERROR expected one of `const`, `default`, `extern`, `fn`, `pub`, `type`, `unsafe`, or `}`