Fix incorrect behaviour if not resolved

crates/ra_assists/src/assist_context.rs

@@ -179,6 +179,7 @@ fn add_impl_multiple_files(
         f: impl FnOnce(&mut AssistDirector),
     ) -> Option<()> {
         if !self.resolve {
+            self.buf.push((label, None));
             return None;
         }
         let mut director = AssistDirector::default();