[docs] [issue32200] Full docs build of 3.6 and 3.7 failing since 2017-10-15

[jfbu]

jfbu <jfbu at free.fr> added the comment:

For info, the xetex problem "Improper discretionary list" is presumably the one seen at  https://github.com/sphinx-doc/sphinx/issues/3546. I asked on xetex mailing list at http://tug.org/pipermail/xetex/2017-March/027056.html to which xetex bug it was related but it appears I got no reply. Hence I don't know the precise xetex release which fixed it, but it is ok with `XeTeX 0.99996`. No action was taken on Sphinx side as this appeared to be a XeTeX bug only.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32200>
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