Fix bug introduced in #3564. (#3615)

yilei · web-flow · commit dba3c2695c59 · 2023-03-19T07:43:39.000-07:00
diff --git a/src/black/lines.py b/src/black/lines.py
@@ -598,7 +598,7 @@ def _maybe_empty_lines(self, current_line: Line) -> Tuple[int, int]:
                     before = 1
                 elif (
                     not depth
-                    and self.previous_defs[-1]
+                    and self.previous_defs[-1].depth
                     and current_line.leaves[-1].type == token.COLON
                     and (
                         current_line.leaves[0].value
