editors: only extend line width to 119 for C and XML files For all other files leave the line width at 79 as before. This is a good idea since we generally don't want text files such as catalog files, unit files or README/NEWS files to be line-broken at 119 since they are regularly browsed on text terminals. While we are at it, also add a couple of comments to the various files. (Note that .editorconfig doesn't carry line-width information, simply because the specification doesn't know the concept.)

editors: specify fill column Let's be a bit more precise with the editor configuration and specify a higher fill column of 119. This isn't as emacs' default of 70, but also not particularly high on today's screens. While we are at it, also set a couple of other emacs C coding style variables.

vimrc: add warning about dangerous exrc mode

vimrc: disable -fdiagnostics-color output

add .vimrc

add .vimrc