Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/@python2/shlex.pyi

@@ -0,0 +1,30 @@
+from typing import IO, Any, List, Optional, Text, TypeVar, Union
+
+def split(s: Optional[str], comments: bool = ..., posix: bool = ...) -> List[str]: ...
+
+_SLT = TypeVar("_SLT", bound=shlex)
+
+class shlex:
+    def __init__(self, instream: Union[IO[Any], Text] = ..., infile: IO[Any] = ..., posix: bool = ...) -> None: ...
+    def __iter__(self: _SLT) -> _SLT: ...
+    def next(self) -> str: ...
+    def get_token(self) -> Optional[str]: ...
+    def push_token(self, _str: str) -> None: ...
+    def read_token(self) -> str: ...
+    def sourcehook(self, filename: str) -> None: ...
+    def push_source(self, stream: IO[Any], filename: str = ...) -> None: ...
+    def pop_source(self) -> IO[Any]: ...
+    def error_leader(self, file: str = ..., line: int = ...) -> str: ...
+    commenters: str
+    wordchars: str
+    whitespace: str
+    escape: str
+    quotes: str
+    escapedquotes: str
+    whitespace_split: bool
+    infile: IO[Any]
+    source: Optional[str]
+    debug: int
+    lineno: int
+    token: Any
+    eof: Optional[str]