diff --git a/black.py b/black.py
index 4d85865..9ac16c0 100644
--- a/black.py
+++ b/black.py
@@ -2435,7 +2435,7 @@ def append_to_line(leaf: Leaf) -> Iterator[Line]:
         nonlocal current_line
         try:
             current_line.append_safe(leaf, preformatted=True)
-        except ValueError as ve:
+        except ValueError:
             yield current_line
 
             current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)