Only run the cfg check for single lines

Author: JohnTitor

ci/style.rs

@@ -125,16 +125,15 @@ fn check_style(file: &str, path: &Path, err: &mut Errors) {
         if line.len() > 80 {
             err.error(path, i, "line longer than 80 chars");
         }
-        // This doesn't work any more due to rustfmt changes
-        /*if line.contains("#[cfg(") && !line.contains(" if ")
+        if line.contains("#[cfg(") && line.contains(']') && !line.contains(" if ")
             && !(line.contains("target_endian") ||
                  line.contains("target_arch"))
         {
             if state != State::Structs {
                 err.error(path, i, "use cfg_if! and submodules \
                                     instead of #[cfg]");
             }
-        }*/
+        }
         if line.contains("#[derive(") && (line.contains("Copy") || line.contains("Clone")) {
             err.error(path, i, "impl ::Copy and ::Clone manually");
         }