[GRASS-git] [OSGeo/grass] 4ea78a: g.region: Fix the flat flag (#3216)

[Huidae Cho]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 4ea78a7ff9b65d8f7d3d4d4bf16fcaf1a468b365
      https://github.com/OSGeo/grass/commit/4ea78a7ff9b65d8f7d3d4d4bf16fcaf1a468b365
  Author: Huidae Cho <grass4u at gmail.com>
  Date:   2024-02-09 (Fri, 09 Feb 2024)

  Changed paths:
    M general/g.region/main.c
    M general/g.region/printwindow.c
    M general/g.region/testsuite/test_g_region.py

  Log Message:
  -----------
  g.region: Fix the flat flag (#3216)

* g.region: Fix the flat flag

* Revert datum: and ellipsoid:

* Flatten other outputs

* Flat (-f) requires shell (-g) print

* Flatten WMS output

* add test

* fix formatting

---------

Co-authored-by: Anna Petrasova <kratochanna at gmail.com>
Co-authored-by: Edouard Choinière <27212526+echoix at users.noreply.github.com>