Fixed field_set_and_list_wrapping_for_method to use explicit join instead of to_s for Ruby 1.9
Fixed field_set_and_list_wrapping_for_method to use explicit join instead of to_s for Ruby 1.9

Davidzhu001/formtastic,paulodiovani/formtastic,EndingChaung/formtastic,paulodiovani/formtastic,mikz/formtastic,Davidzhu001/formtastic,pcreux/formtastic,thenthen8515/formtastic,sideci-sample/sideci-sample-formtastic,pat/formtastic,ConferenceCloud/formtastic,Guestfolio/formtastic,ryanfox1985/formtastic,nishaya/formtastic,ryanfox1985/formtastic,justinfrench/formtastic,justinfrench/formtastic,Baltazore/formtastic,nishaya/formtastic,crashlytics/formtastic,thenthen8515/formtastic,EndingChaung/formtastic,Guestfolio/formtastic,wested/formtastic,ConferenceCloud/formtastic,ryanfox1985/formtastic,justinfrench/formtastic,mikz/formtastic