Bug#918807: taurus: FTBFS with Sphinx 1.8: No module named pngmath

[Dmitry Shachnev]

Source: taurus
Version: 4.0.3+dfsg-1
Severity: important
User: python-modules-team at lists.alioth.debian.org
Usertags: sphinx1.8

Dear Maintainer,

taurus fails to build with Sphinx 1.8, currently available in experimental:

  Running Sphinx v1.8.3
  [...]

  Extension error:
  Could not import extension sphinx.ext.pngmath (exception: No module named pngmath)

The pngmath extension was deprecated in Sphinx 1.4 and has been removed [1]
in Sphinx 1.8. The recommended alternative is sphinx.ext.imgmath [2] which
also has SVG support in addition to PNG.

However, it looks like taurus is using no math directives or roles, so
the pngmath extension can be simply removed. Upstream has already done it
in [3].

[1]: https://github.com/sphinx-doc/sphinx/pull/4702
[2]: https://www.sphinx-doc.org/en/1.8/usage/extensions/math.html
[3]: https://github.com/taurus-org/taurus/commit/8a5fb0772f734f45

--
Dmitry Shachnev
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