[issue2650] re.escape should not escape underscore

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> The escaped regexp is not utf-8 (why should it be?)

I suppose it is annoying if you want to print the escaped regexp for
debugging purposes.

Anyway, I suppose someone should really decide if improving re.escape is
worth it, and if not, close the bug.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue2650>
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