Fix style selector

Author: pearmini

editor/index.css

@@ -145,10 +145,10 @@
 
   .cm-output-line.cm-error-line {
     background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4' %3E%3Cpath fill='%23ff0000' fill-opacity='0.4' d='M1 3h1v1H1V3zm2-2h1v1H3V1z'%3E%3C/path%3E%3C/svg%3E");
+  }
 
-    .ͼ1l {
-      color: #c83f30 !important;
-    }
+  .cm-output-line.cm-error-line span {
+    color: #c83f30 !important;
   }
 
   .cm-doc-tag span {