omitNeedlessWords: Use existing helpers getPriorStr and getRestOfStr
omitNeedlessWords: Use existing helpers getPriorStr and getRestOfStr

...rather than asking WordIterators for their position and then
immediately calling StringRef::substr.

No functionality change.

glessard/swift,gregomni/swift,lorentey/swift,parkera/swift,ahoppen/swift,glessard/swift,karwa/swift,allevato/swift,aschwaighofer/swift,airspeedswift/swift,lorentey/swift,airspeedswift/swift,karwa/swift,devincoughlin/swift,CodaFi/swift,JGiola/swift,tkremenek/swift,devincoughlin/swift,airspeedswift/swift,stephentyrone/swift,devincoughlin/swift,lorentey/swift,benlangmuir/swift,lorentey/swift,apple/swift,lorentey/swift,aschwaighofer/swift,parkera/swift,karwa/swift,allevato/swift,allevato/swift,apple/swift,xwu/swift,nathawes/swift,glessard/swift,lorentey/swift,harlanhaskins/swift,atrick/swift,harlanhaskins/swift,rudkx/swift,allevato/swift,glessard/swift,gribozavr/swift,benlangmuir/swift,xwu/swift,xwu/swift,hooman/swift,JGiola/swift,CodaFi/swift,atrick/swift,ahoppen/swift,CodaFi/swift,glessard/swift,devincoughlin/swift,devincoughlin/swift,devincoughlin/swift,ahoppen/swift,airspeedswift/swift,gregomni/swift,stephentyrone/swift,allevato/swift,nathawes/swift,nathawes/swift,rudkx/swift,jmgc/swift,hooman/swift,hooman/swift,tkremenek/swift,stephentyrone/swift,stephentyrone/swift,parkera/swift,parkera/swift,xwu/swift,tkremenek/swift,gregomni/swift,gribozavr/swift,CodaFi/swift,gregomni/swift,gribozavr/swift,JGiola/swift,ahoppen/swift,aschwaighofer/swift,jckarter/swift,ahoppen/swift,harlanhaskins/swift,JGiola/swift,airspeedswift/swift,harlanhaskins/swift,jmgc/swift,ahoppen/swift,parkera/swift,glessard/swift,lorentey/swift,jckarter/swift,rudkx/swift,CodaFi/swift,atrick/swift,karwa/swift,stephentyrone/swift,aschwaighofer/swift,roambotics/swift,benlangmuir/swift,CodaFi/swift,xwu/swift,jckarter/swift,harlanhaskins/swift,gribozavr/swift,tkremenek/swift,gribozavr/swift,roambotics/swift,rudkx/swift,rudkx/swift,nathawes/swift,CodaFi/swift,harlanhaskins/swift,gribozavr/swift,devincoughlin/swift,harlanhaskins/swift,jmgc/swift,gregomni/swift,benlangmuir/swift,jmgc/swift,jmgc/swift,stephentyrone/swift,gregomni/swift,nathawes/swift,allevato/swift,tkremenek/swift,lorentey/swift,aschwaighofer/swift,hooman/swift,xwu/swift,airspeedswift/swift,jckarter/swift,parkera/swift,gribozavr/swift,nathawes/swift,hooman/swift,parkera/swift,karwa/swift,JGiola/swift,allevato/swift,hooman/swift,parkera/swift,karwa/swift,apple/swift,roambotics/swift,jckarter/swift,airspeedswift/swift,apple/swift,roambotics/swift,gribozavr/swift,JGiola/swift,jckarter/swift,jckarter/swift,roambotics/swift,karwa/swift,aschwaighofer/swift,karwa/swift,jmgc/swift,nathawes/swift,devincoughlin/swift,jmgc/swift,atrick/swift,tkremenek/swift,aschwaighofer/swift,roambotics/swift,atrick/swift,xwu/swift,tkremenek/swift,apple/swift,benlangmuir/swift,atrick/swift,benlangmuir/swift,apple/swift,rudkx/swift,hooman/swift,stephentyrone/swift