man package
Display Unix man pages inside Atom. This has been tested with OSX. It probably needs work for Linux. It is not applicable to Windows. (Or do we want to display Cygwin man pages on Windows?)
Usage
There is a "Man: Man" command in the command palette. It asks for the man page to view.
Internal
To learn how grammars work, see here:
https://gist.github.com/DamnedScholar/622926bcd222eb1ddc483d12103fd315