Fix / clarify the docstring.
Fix / clarify the docstring.

Plexxi/st2,StackStorm/st2,Plexxi/st2,StackStorm/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2,nzlosh/st2,StackStorm/st2,nzlosh/st2