[issue10494] Demo/comparisons/regextest.py needs some usage information.

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

Beware of UUOC: http://en.wikipedia.org/wiki/Cat_%28Unix%29#Useless_use_of_cat

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nosy: +eric.araujo

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<http://bugs.python.org/issue10494>
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