Wrapper for Python's stdlib `tokenize` supporting roundtrips
Description
The stdlib tokenize module does not properly roundtrip. This wrapper around the stdlib provides
two additional tokens ESCAPED_NL and UNIMPORTANT_WS, and a Token data type. Use src_to_tokens
and tokens_to_src to roundtrip.
This library is useful if you are writing a refactoring tool based on the python tokenization.
