[GRASS-git] [OSGeo/grass] c5a5e7: Add zsh terminal prompt support (#722)

[nilason]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: c5a5e71ccc9778c4afddff45bfce5ea2257a29e1
      https://github.com/OSGeo/grass/commit/c5a5e71ccc9778c4afddff45bfce5ea2257a29e1
  Author: nilason <n_larsson at yahoo.com>
  Date:   2020-07-15 (Wed, 15 Jul 2020)

  Changed paths:
    M general/g.mapset/main.c
    M lib/init/grass.py

  Log Message:
  -----------
  Add zsh terminal prompt support (#722)

Adds zsh terminal prompt support and includes history change message for zsh in g.mapset.

Fixes #719.