[docs] [issue30078] "-m unittest --help" says nothing about direct script exection

[R. David Murray]

R. David Murray added the comment:

Agreed that it looks like another example line should be added to the help for this case.

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nosy: +r.david.murray
stage:  -> needs patch
versions: +Python 3.7 -Python 3.3, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30078>
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