bug: index off by one
bug: index off by one

Very minor bug but forceTrailingSlash always adds a / if set to true because the index was off by one.
denisKaranja/js-data-angular,yoda-yoda/js-data-angular,denisKaranja/js-data-angular,aboieriu/js-data-angular,aboieriu/js-data-angular,yoda-yoda/js-data-angular,js-data/js-data-angular,js-data/js-data-angular