[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

mypy/stubgenc.py

@@ -14,6 +14,7 @@
 from types import FunctionType, ModuleType
 from typing import Any, Callable, Mapping
 
+import mypy.util
 from mypy.fastparse import parse_type_comment
 from mypy.moduleinspect import is_c_module
 from mypy.stubdoc import (
@@ -36,7 +37,6 @@
     infer_method_arg_types,
     infer_method_ret_type,
 )
-import mypy.util
 
 
 class ExternalSignatureGenerator(SignatureGenerator):