Free Pro WebDev Tools tutorial, Is Atom good for Git?
Atom can be used as your Git commit editor and ships with the language-git package which adds syntax highlighting to edited commit, merge, and rebase messages. The language-git package will help remind you to be brief by colorizing the first lines of commit messages when they're longer than 50 or 65 characters.
When Microsoft acquired GitHub, there was speculation (and fear on my behalf) that GitHub would end up axing Atom in favor of Visual Studio Code. Taking a look at the commit activity for Atom on github.com shows that since the end of June 2019, development has basically stopped completely.