Create a PR template

[romainl]

Reference: https://help.github.com/en/github/building-a-strong-community/creating-a-pull-request-template-for-your-repository

[habamax]

1. colors/tools/check_colors.vim should not have errors
2. for each background attach screenshots of
   • colors/tools/sample_base.vim
   • colors/tools/sample_popupmenu.vim
   • colors/tools/sample_diff.vim
   • colors/tools/sample_messages.vim
3. if a colorscheme supports termguicolors/GUI, t_Co=256 and/or t_Co=16 attach screenshots of pt2 per each

[habamax]

example: habamax.vim

Background: light

GUI/termguicolors

sample_base.vim

sample_popupmenu.vim

sample_diff.vim

sample_messages.vim

t_Co=256

sample_base.vim

sample_popupmenu.vim

sample_diff.vim

sample_messages.vim

Background=dark

GUI/termguicolors

sample_base.vim

sample_popupmenu.vim

sample_diff.vim

sample_messages.vim

t_Co=256

sample_base.vim

sample_popupmenu.vim

sample_diff.vim

sample_messages.vim

[habamax]

huh, window size should be enough to see colorcolumn or maybe adjust color_base.vim to have it at 40 or 50 col.

[habamax]

@romainl too many screenshots or ok?

[romainl]

We are talking colorschemes, here, so we need as many screenshots as possible :-)