[issue28128] Improve the warning message for invalid escape sequences

[Emanuel Barry]

Emanuel Barry added the comment:

Following Ned's email to Python-Dev, I'm upping the priority of this issue to "deferred blocker".

I haven't had a lot of time to work on this, but I had time to think about it, and I think that resolving #28028 would be the best way to solved this. I pinged this issue as well and added several people to nosy there. I've also added it as a dependency of this issue.

To be clear, I really like Eric's approach to this, but I think that resolving #28028 would let us kill a couple of issues with the same patch. My priority is getting this issue here resolved, though, so either way works. I doubt I'll have much time to actually work on this; life's been busy and Python isn't my priority right now (as much as I'd like it to be).

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dependencies: +Convert warnings to SyntaxWarning in parser
priority: normal -> deferred blocker

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28128>
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