Improve docs on invoke.
Improve docs on invoke.

shaiguitar/thor,b-dean/thor,fhernandez173/thor,groovenauts/thor,linkodehub/thor,flyinbutrs/thor,r7kamura/thor,groovenauts/thor,doudou/thor,fancyremarker/thor,segiddins/thor,fhernandez173/thor,flyinbutrs/thor,sideci-sample/sideci-sample-thor,b-dean/thor,fancyremarker/thor,drnic/thor,erikhuda/thor,linkodehub/thor,segiddins/thor,sideci-sample/sideci-sample-thor,r7kamura/thor