fix CI

Author: yoshuawuyts

library/core/src/mem/drop_guard.rs

@@ -138,9 +138,8 @@ where
 // tests copied from https://docs.rs/scopeguard/latest/src/scopeguard/lib.rs.html#1-595
 #[cfg(test)]
 mod tests {
-    use crate::cell::Cell;
-
     use super::*;
+    use crate::cell::Cell;
 
     #[test]
     fn test_only_dropped_by_closure_when_run() {