make mypy happy again (?)

Author: maedoc

test/test_utils.py

@@ -812,7 +812,7 @@ def test_restore_cwd(self):
         # after = None
         try:
             do_command(cmd=['ls /does-not-exist'], cwd=os.path.dirname(before))
-        except RuntimeError as exc:
+        except RuntimeError:
             pass
         finally:
             after = os.getcwd()