[Python-ideas] Ignorable whitespaces in the re.VERBOSE mode

[M.-A. Lemburg]

For consistency, we should probably have "whitespace" for re
equal to whatever "\s" matches, since this is what the engine
itself considers as whitespace (and then also covers the special
case where you use the re.ASCII flag).

Still, the only practical case I could imagine, where extending the
list would indeed make sense, is to have the   character qualify
as whitespace for re.VERBOSE, since this can sometimes be introduced
via copy&paste from other sources (e.g. web pages showing a
regular expression).

Due to whitespace being what it is, it's hard to tell whether you've
just copied a \u0020 or a \u00a0. The latter can easily render the
regular expression non-working with the current interpretation of
re.VERBOSE.

-- 
Marc-Andre Lemburg
eGenix.com

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