apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/2and3/nis.pyi

@@ -1,10 +1,9 @@
 import sys
 from typing import Dict, List
 
-if sys.platform != 'win32':
+if sys.platform != "win32":
     def cat(map: str, domain: str = ...) -> Dict[str, str]: ...
     def get_default_domain() -> str: ...
     def maps(domain: str = ...) -> List[str]: ...
     def match(key: str, map: str, domain: str = ...) -> str: ...
-
     class error(Exception): ...