whoops, fix lint

Signed-off-by: RedGuy12 <[email protected]>

Author: cobaltt7

Diff for: src/black/lines.py

@@ -447,7 +447,8 @@ def is_complex_subscript(self, leaf: Leaf) -> bool:
             if subscript_start.type == syms.subscriptlist:
                 subscript_start = child_towards(subscript_start, leaf)
 
-        # When this is moved out of preview, add syms.namedexpr_test directly to TEST_DESCENDANTS in nodes.py
+        # When this is moved out of preview, add syms.namedexpr_test directly to
+        # TEST_DESCENDANTS in nodes.py
         if Preview.walrus_subscript in self.mode:
             test_decendants = TEST_DESCENDANTS | {syms.namedexpr_test}
         else: