Fix a bug in the dev script.
Fix a bug in the dev script.

PiperOrigin-RevId: 189289855

chalin/angular2,matanlurey/angular,chalin/angular2,angulardart/angular,kevmoo/angular,matanlurey/angular,kevmoo/angular,angulardart/angular,matanlurey/angular,kevmoo/angular,chalin/angular2,angulardart/angular