It is good that atom is opening. I've tried this with VSC and Sublime and it worked but as you can see you were trying to commit with blank message.
- Type
git commit - Wait until atom open
- Type your message.
- Save file and close editor
In that situation you should see proper result of git commit
EDIT: To check that --wait flag works. Type in console atom --wait (or maybe your terminal accpet only -w flag, dunno)
If this flag works terminal prompt should appear after closing atom. If doesn't should act like without flag so when you type, it opens atom and immediately show next terminal prompt.
