Fixes mistake in argument_spec.rb wording
Fixes mistake in argument_spec.rb wording

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