Cleanup type-alias-enum-variants.rs test.

Author: Centril

src/test/ui/type-alias-enum-variants/type-alias-enum-variants.rs

@@ -1,9 +1,14 @@
+// Check that a generic type for an `enum` admits type application
+// on both the type constructor and the generic type's variant.
+//
+// Also check that a type alias to said generic type admits type application
+// on the type constructor but *NOT* the variant.
+
 type Alias<T> = Option<T>;
 
 fn main() {
     let _ = Option::<u8>::None; // OK
     let _ = Option::None::<u8>; // OK (Lint in future!)
     let _ = Alias::<u8>::None; // OK
-    let _ = Alias::None::<u8>; // Error
-    //~^ type arguments are not allowed for this type
+    let _ = Alias::None::<u8>; //~ ERROR type arguments are not allowed for this type
 }

src/test/ui/type-alias-enum-variants/type-alias-enum-variants.stderr

@@ -1,7 +1,7 @@
 error[E0109]: type arguments are not allowed for this type
-  --> $DIR/type-alias-enum-variants.rs:7:27
+  --> $DIR/type-alias-enum-variants.rs:13:27
    |
-LL |     let _ = Alias::None::<u8>; // Error
+LL |     let _ = Alias::None::<u8>;
    |                           ^^ type argument not allowed
 
 error: aborting due to previous error