- update to 1.6.3:
* #3821: Failed to import sphinx.util.compat with docutils-0.14rc1
* #3829: sphinx-quickstart template is incomplete regarding use of alabaster
* #3772: 'str object' has no attribute 'filename'
* Emit wrong warnings if citation label includes hyphens (refs: #3565)
* #3858: Some warnings are not colored when using --color option
* #3775: Remove unwanted whitespace in default template
* #3835: sphinx.ext.imgmath fails to convert SVG images if project directory
name contains spaces
* #3850: Fix color handling in make mode's help command
* #3865: use of self.env.warn in sphinx extension fails
* #3824: production lists apply smart quotes transform since Sphinx 1.6.1
* latex: fix ``\sphinxbfcode`` swallows initial space of argument
* #3878: Quotes in auto-documented class attributes should be straight quotes
in PDF output
* #3881: LaTeX figure floated to next page sometimes leaves extra vertical
whitespace
* #3885: duplicated footnotes raises IndexError
* #3873: Failure of deprecation warning mechanism of
``sphinx.util.compat.Directive``
* #3874: Bogus warnings for "citation not referenced" for cross-file citations
* #3860: Don't download images when builders not supported images
* #3860: Remote image URIs without filename break builders not supported remote
images
* #3833: command line messages are translated unintentionally with ``language``
setting.
* #3840: make checking ``epub_uid`` strict
* #3851, #3706: Fix about box drawing characters for PDF output
* #3900: autosummary could not find methods
* #3902: Emit error if ``latex_documents`` contains non-unicode string in py2