Add example to validation_helpers plugin RDoc
Add example to validation_helpers plugin RDoc

knut2/sequel,dennis-d/custom_sequel,seeARMS/sequel,freshpay/sequel,nicohvi/sequel,nju520/sequel,knut2/sequel,mpalmer/sequel,t-morgan/sequel,davidbegin/sequel,reubano/sequel,uhoh-itsmaciek/sequel,uhoh-itsmaciek/sequel,reubano/sequel,mpalmer/sequel,Marketcircle/sequel,gferguson-gd/sequel,beni55/sequel,yazshel/sequel,offshore-safety/sequel,chef/sequel,pfarrell/sequel,seeARMS/sequel,offshore-safety/sequel,bigfix/sequel,dennis-d/custom_sequel,offshore-safety/sequel,beni55/sequel,davidbegin/sequel,nju520/sequel,yazshel/sequel,freshpay/sequel,tmm1/sequel,gferguson-gd/sequel,t-morgan/sequel,pfarrell/sequel,nicohvi/sequel