pipes.quote takes AnyStr (#4173)

stdlib/2/pipes.pyi

@@ -1,4 +1,4 @@
-from typing import Any, IO
+from typing import Any, IO, AnyStr
 
 class Template:
     def __init__(self) -> None: ...
@@ -10,4 +10,4 @@ class Template:
     def open(self, file: str, mode: str) -> IO[Any]: ...
     def copy(self, infile: str, outfile: str) -> None: ...
 
-def quote(s: str) -> str: ...
+def quote(s: AnyStr) -> AnyStr: ...