[GRASS-git] [OSGeo/grass] e60e25: pythonlib: Enable escape sequence warning (#1529)

[Vaclav Petras]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: e60e2549bbe546811a2400a9ed08e28b209ddac6
      https://github.com/OSGeo/grass/commit/e60e2549bbe546811a2400a9ed08e28b209ddac6
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2021-04-15 (Thu, 15 Apr 2021)

  Changed paths:
    M python/grass/.flake8
    M python/grass/pygrass/utils.py
    M python/grass/script/db.py
    M python/grass/script/setup.py

  Log Message:
  -----------
  pythonlib: Enable escape sequence warning (#1529)

* Enable globally invalid escape sequence from Flake8 in grass pkg.
* Fix two unrelated usages of backslashes by raw string with R (often used
  as a standard for non-regexp raw strings).
* Remove outdated module formatting/reference from Doxygen.
* Ignore the rest for now using per file ignores.