apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/3/shlex.pyi

@@ -1,12 +1,14 @@
-from typing import List, Tuple, Any, TextIO, Union, Optional, Iterable, TypeVar
 import sys
+from typing import Any, Iterable, List, Optional, TextIO, Tuple, TypeVar, Union
 
 def split(s: str, comments: bool = ..., posix: bool = ...) -> List[str]: ...
+
 if sys.version_info >= (3, 8):
     def join(split_command: Iterable[str]) -> str: ...
+
 def quote(s: str) -> str: ...
 
-_SLT = TypeVar('_SLT', bound=shlex)
+_SLT = TypeVar("_SLT", bound=shlex)
 
 class shlex(Iterable[str]):
     commenters: str
@@ -27,11 +29,15 @@ class shlex(Iterable[str]):
         punctuation_chars: str
 
     if sys.version_info >= (3, 6):
-        def __init__(self, instream: Union[str, TextIO] = ..., infile: Optional[str] = ...,
-                     posix: bool = ..., punctuation_chars: Union[bool, str] = ...) -> None: ...
+        def __init__(
+            self,
+            instream: Union[str, TextIO] = ...,
+            infile: Optional[str] = ...,
+            posix: bool = ...,
+            punctuation_chars: Union[bool, str] = ...,
+        ) -> None: ...
     else:
-        def __init__(self, instream: Union[str, TextIO] = ..., infile: Optional[str] = ...,
-                     posix: bool = ...) -> None: ...
+        def __init__(self, instream: Union[str, TextIO] = ..., infile: Optional[str] = ..., posix: bool = ...) -> None: ...
     def get_token(self) -> str: ...
     def push_token(self, tok: str) -> None: ...
     def read_token(self) -> str: ...
@@ -39,7 +45,6 @@ class shlex(Iterable[str]):
     # TODO argument types
     def push_source(self, newstream: Any, newfile: Any = ...) -> None: ...
     def pop_source(self) -> None: ...
-    def error_leader(self, infile: str = ...,
-                     lineno: int = ...) -> None: ...
+    def error_leader(self, infile: str = ..., lineno: int = ...) -> None: ...
     def __iter__(self: _SLT) -> _SLT: ...
     def __next__(self) -> str: ...