The ones who use thoughtbot/dotfiles share almost all the configuration. The ones who care about their dotfiles will have those basics correctly configured. thoughtbot/dotfiles is geared towards vim and tmux.
But there are people who use Sublime Text, and I don’t think we have an .editorconfig or similar in any repository yet. Also, Sublime Text doesn’t read that file by default yet, needs a plugin. I believe it has sane defaults according to file type anyway.
I don’t know of other editors in use at thoughtbot. I wouldn’t be against adding a Sublime Preferences somewhere in dotfiles where to centralize good configuration.