error: css! found an unclosed `{` delimiter in the stylesheet
       help: close every `{` with its matching delimiter before the end of the css! body
 --> tests/ui/css_invalid_stylesheet.rs:4:10
  |
4 |     css!("body { color: red;");
  |          ^^^^^^^^^^^^^^^^^^^^

error: css! found an unclosed `{` delimiter in the stylesheet
       help: close every `{` with its matching delimiter before the end of the css! body
 --> tests/ui/css_invalid_stylesheet.rs:6:18
  |
6 |     let _ = css!(r#".card { display: block; "#);
  |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
