add missing f-string (#2650)

2021-11-27 02:53:16 +00:00 · 2021-11-27 02:53:16 +00:00 · 72a84d4099
commit 72a84d4099
parent e0253080b0
1 changed files with 1 additions and 1 deletions
--- a/src/black/handle_ipynb_magics.py
+++ b/src/black/handle_ipynb_magics.py
@ -422,7 +422,7 @@ def visit_Assign(self, node: ast.Assign) -> None:
                    src += f" {args[1]}"
            else:
                raise AssertionError(
-                    "Unexpected IPython magic {node.value.func.attr!r} found. "
+                    f"Unexpected IPython magic {node.value.func.attr!r} found. "
                    "Please report a bug on https://github.com/psf/black/issues."
                ) from None
            self.magics[node.value.lineno].append(