Fix boolean error in form helpers guide
Fix boolean error in form helpers guide

Erol/rails,kmcphillips/rails,georgeclaghorn/rails,esparta/rails,Vasfed/rails,yawboakye/rails,rails/rails,BlakeWilliams/rails,yahonda/rails,yawboakye/rails,rails/rails,Edouard-chin/rails,georgeclaghorn/rails,Vasfed/rails,yahonda/rails,georgeclaghorn/rails,kmcphillips/rails,Erol/rails,Vasfed/rails,Edouard-chin/rails,kddeisz/rails,yawboakye/rails,MSP-Greg/rails,yawboakye/rails,yahonda/rails,Vasfed/rails,esparta/rails,kddeisz/rails,kmcphillips/rails,Edouard-chin/rails,rails/rails,kddeisz/rails,kddeisz/rails,esparta/rails,BlakeWilliams/rails,BlakeWilliams/rails,georgeclaghorn/rails,BlakeWilliams/rails,yahonda/rails,Edouard-chin/rails,MSP-Greg/rails,MSP-Greg/rails,Erol/rails,kmcphillips/rails,MSP-Greg/rails,esparta/rails,rails/rails,Erol/rails