Update sphinx to 1.7.8

[pyup-bot]

This PR updates Sphinx from 1.7.7 to 1.7.8.

Changelog

1.7.8

=====================================

Incompatible changes
--------------------

* The type of ``env.included`` has been changed to dict of set

Bugs fixed
----------

* 5320: intersphinx: crashed if invalid url given
* 5326: manpage: crashed when invalid docname is specified as ``man_pages``
* 5322: autodoc: ``Any`` typehint causes formatting error
* 5327: "document isn't included in any toctree" warning on rebuild with
generated files
* 5335: quickstart: escape sequence has been displayed with MacPorts' python

Links

• PyPI: https://pypi.org/project/sphinx
• Changelog: https://pyup.io/changelogs/sphinx/
• Homepage: http://sphinx-doc.org/

[coveralls]

Pull Request Test Coverage Report for Build 1134

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 98.257%

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Totals
Change from base Build 1128:	0.0%
Covered Lines:	3945
Relevant Lines:	4015

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💛 - Coveralls