Do not add the release channel on stable versions of Atom
Do not add the release channel on stable versions of Atom

This is done to avoid changing the application user model id on Atom
stable, which prevents pins from currently installed Atom stable
versions to stop working.

PKRoma/atom,Mokolea/atom,Mokolea/atom,brettle/atom,atom/atom,PKRoma/atom,atom/atom,atom/atom,brettle/atom,brettle/atom,PKRoma/atom,Mokolea/atom