Bug#918826: python-pyknon: FTBFS with Sphinx 1.8: No module named pngmath

[Dmitry Shachnev]

Source: python-pyknon
Version: 1.0-1
Severity: important
User: python-modules-team at lists.alioth.debian.org
Usertags: sphinx1.8

Dear Maintainer,

python-pyknon fails to build with Sphinx 1.8, currently available in
experimental:

  cd docs && make html
  make[2]: Entering directory '/<<PKGBUILDDIR>>/docs'
  sphinx-build -b html -d _build/doctrees   . _build/html
  Running Sphinx v1.8.3

  Extension error:
  Could not import extension sphinx.ext.pngmath (exception: No module named pngmath)
  make[2]: *** [Makefile:39: html] Error 2

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.

To me it looks like this extension is unused anyway: there are no “.. math::”
directives or “:math:” roles, and the binary package does not have any
generated PNG images. So this extension can be simply removed from extensions
in conf.py.

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

--
Dmitry Shachnev
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