[GRASS-git] [OSGeo/grass] a910a5: gunittest docs: fix broken links (#934)

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: a910a523637d865ac5b9208ce6b3481e6e52867b
      https://github.com/OSGeo/grass/commit/a910a523637d865ac5b9208ce6b3481e6e52867b
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-08-28 (Fri, 28 Aug 2020)

  Changed paths:
    M lib/python/docs/conf.py
    M lib/python/docs/src/gunittest_testing.rst

  Log Message:
  -----------
  gunittest docs: fix broken links (#934)

* fix Python 3 syntax error, contributed by @petrasovaa
* fix broken links