[issue8191] Make arg0 required argument in os.execl* functions

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

Alexander, do you think it would be worthwhile to write up a summary of all the issues involved in these three releated bugs and post it to python-dev?  Alternatively we could ask for a decision on what should be done in python 2.7 from Benjamin.

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nosy: +r.david.murray

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<http://bugs.python.org/issue8191>
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