[docs] [issue29521] Minor warning messages when compiling documentation

[Nick Coghlan]

Nick Coghlan added the comment:


New changeset 3337d33a4518f7ab8a7ab6c9a75b8b92ba348b27 by Nick Coghlan in branch '3.6':
[backport to 3.6] bpo-29529: Add .travis.yml to 3.6 branch (#25)
https://github.com/python/cpython/commit/3337d33a4518f7ab8a7ab6c9a75b8b92ba348b27


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<http://bugs.python.org/issue29521>
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