[issue21688] Improved error msg for make.bat htmlhelp

[Roundup Robot]

Roundup Robot added the comment:

New changeset b841b80e6421 by Zachary Ware in branch '3.4':
Issue #21688: Give informative error message when hhc.exe cannot be found.
http://hg.python.org/cpython/rev/b841b80e6421

New changeset e5594e751a2e by Zachary Ware in branch 'default':
Issue #21688: Merge with 3.4
http://hg.python.org/cpython/rev/e5594e751a2e

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21688>
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