actions.copy should work with one argument (source==dest, like in actions.directory)
actions.copy should work with one argument (source==dest, like in actions.directory)

So that this:
  this.copy('Procfile', 'Procfile');

Can be written like this:
  this.copy('Procfile');
andrewstuart/generator,rutaihwa/generator,yeoman/generator,JulienCabanes/generator,yeoman/generator,yeoman/environment