[GRASS-git] [OSGeo/grass] bd8803: standardization of Markdown files (#346)

[Ondrej Pesek]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: bd8803d17dd5a0a746921ac54edb46848bd04f78
      https://github.com/OSGeo/grass/commit/bd8803d17dd5a0a746921ac54edb46848bd04f78
  Author: Ondrej Pesek <pesej.ondrek at gmail.com>
  Date:   2020-02-17 (Mon, 17 Feb 2020)

  Changed paths:
    M CONTRIBUTING.md
    M README.md
    M doc/howto_release.md
    M docker/alpine/README_alpine.md
    M docker/debian/README_debian.md
    M docker/testdata/README.md
    M docker/ubuntu/README_ubuntu.md
    M mswindows/external/rbatch/batchfiles.md
    M singularity/debian/README_debian.md

  Log Message:
  -----------
  standardization of Markdown files (#346)

* line length 80 characters
* standardize the number of spaces after list markers (=1)
* standardize code blocks (do not mix triple grave accents with hard tabs)(accents chosen)
* headers surrounded by blank lines
* fenced code blocks surrounded by blank lines
* lists surrounded by blank lines
* avoid trailing punctuation in headers
* avoid trailing spaces
* avoid multiple consecutive blank lines
* avoid dollar signs in code blocks when not needed
* avoid bare links (use `<url>` instead)
* minor (HTTPS, missing links) fixes

Co-authored-by: Markus Neteler <neteler at gmail.com>