Add a test for #1209

Author: topecongiro

tests/source/macros.rs

@@ -224,3 +224,9 @@ fn special_case_macros() {
     // assert!
     assert!(result, "Arr! While plunderin' the hold, we got '{}' when given '{}' (we expected '{}')", result, input, expected);
 }
+
+// #1209
+impl Foo {
+    /// foo
+    pub fn foo(&self) -> Bar<foo!(   )> {}
+}

tests/target/macros.rs

@@ -284,3 +284,9 @@ fn special_case_macros() {
         result, input, expected
     );
 }
+
+// #1209
+impl Foo {
+    /// foo
+    pub fn foo(&self) -> Bar<foo!()> {}
+}