[issue11947] re.IGNORECASE does not match literal "_" (underscore)

[Matthew Barnett]

Matthew Barnett <python at mrabarnett.plus.com> added the comment:

help(re.sub) says:

    sub(pattern, repl, string, count=0)

and re.IGNORECASE has a value of 2.

Therefore this:

    re.sub("_", "X", subject, re.IGNORECASE)

is telling it to replace at most 2 occurrences of "_".

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nosy: +mrabarnett

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<http://bugs.python.org/issue11947>
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