[issue15820] Add additional info to Resources area on Dev Guide

[Roundup Robot]

Roundup Robot added the comment:

New changeset 18e31605b161 by R David Murray in branch 'default':
#15820: Improve the Helping with the Devguide section
http://hg.python.org/devguide/rev/18e31605b161

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15820>
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