diff --git a/src/_pytest/assertion/util.py b/src/_pytest/assertion/util.py
index d852a3479..c0e4f4d20 100644
--- a/src/_pytest/assertion/util.py
+++ b/src/_pytest/assertion/util.py
@@ -460,6 +460,7 @@ def _compare_eq_cls(left: Any, right: Any, verbose: int) -> List[str]:
         fields_to_check = left._fields
     else:
         assert False
+        
     indent = "  "
     same = []
     diff = []