Correctly(?) escape distribution names for wheels

[trishankatdatadog]

Thanks for pip2pi, @wolever!

Unfortunately, I found that it wasn't correctly escaping distribution names in wheels according to PEP 427:

pypa/pip#5006

Attached is patch that hopefully correctly fixes it. I know @pfmoore and @dstufft must be busy, but I would greatly appreciate it if they could very quickly review. Thanks, everyone!

Cc: @ofek @truthbk

[pfmoore]

Honestly, I can't really say for sure, as I don't know the codebase or what the project is trying to do.

If you have a project name, you can get the correct wheel name by escaping as in the wheel spec. To that extent the first hunk of the code is using the correct escaping (although without tracking where to_safe_name is used, I can't confirm it's only being used for that purpose). As for the second chunk, I'm not clear what that's doing at all, so I can't comment, sorry.

[trishankatdatadog]

Not a problem, totally understood. Thanks for your time, @pfmoore, much appreciated!