[allocbox-to-stack] Improve comments. NFC.
[allocbox-to-stack] Improve comments. NFC.

Swift SVN r12819

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osh/swift,hooman/swift,dduan/swift,Jnosh/swift,swiftix/swift,swiftix/swift.old,jtbandes/swift,rudkx/swift,shahmishal/swift,OscarSwanros/swift,calebd/swift,kentya6/swift,gmilos/swift,adrfer/swift,roambotics/swift,arvedviehweger/swift,Jnosh/swift,devincoughlin/swift,airspeedswift/swift,LeoShimonaka/swift,ken0nek/swift,hooman/swift,aschwaighofer/swift,Jnosh/swift,shajrawi/swift,practicalswift/swift,jmgc/swift,arvedviehweger/swift,tkremenek/swift,ben-ng/swift,kstaring/swift,devincoughlin/swift,danielmartin/swift,gregomni/swift,amraboelela/swift,gregomni/swift,kentya6/swift,ken0nek/swift,khizkhiz/swift,deyton/swift,dduan/swift,return/swift,sschiau/swift,SwiftAndroid/swift,glessard/swift,roambotics/swift,manavgabhawala/swift,atrick/swift,nathawes/swift,swiftix/swift,SwiftAndroid/swift,adrfer/swift,practicalswift/swift,huonw/swift,alblue/swift,frootloops/swift,tinysun212/swift-windows,apple/swift,atrick/swift,frootloops/swift,SwiftAndroid/swift,tardieu/swift,stephentyrone/swift,IngmarStein/swift,Ivacker/swift,tardieu/swift,MukeshKumarS/Swift,djwbrown/swift,milseman/swift,shahmishal/swift,LeoShimonaka/swift,emilstahl/swift,tkremenek/swift,djwbrown/swift,gribozavr/swift,kentya6/swift,johnno1962d/swift,shahmishal/swift,mightydeveloper/swift,parkera/swift,ken0nek/swift,amraboelela/swift,modocache/swift,kusl/swift,dreamsxin/swift,manavgabhawala/swift,cbrentharris/swift,jtbandes/swift,danielmartin/swift,apple/swift,LeoShimonaka/swift,benlangmuir/swift,jckarter/swift,atrick/swift,IngmarStein/swift,arvedviehweger/swift,tinysun212/swift-windows,gmilos/swift,gribozavr/swift,SwiftAndroid/swift,jmgc/swift,aschwaighofer/swift,gmilos/swift,aschwaighofer/swift,sdulal/swift,brentdax/swift,codestergit/swift,tjw/swift,kusl/swift,parkera/swift,Jnosh/swift,gribozavr/swift,OscarSwanros/swift,Ivacker/swift,calebd/swift,calebd/swift,swiftix/swift.old,cbrentharris/swift,rudkx/swift,johnno1962d/swift,alblue/swift,xedin/swift,khizkhiz/swift,manavgabhawala/swift,nathawes/swift,karwa/swift,ben-ng/swift,karwa/swift,shajrawi/swift,IngmarStein/swift,tjw/swift,xwu/swift,russbishop/swift,gottesmm/swift,swiftix/swift.old,ahoppen/swift,nathawes/swift,ken0nek/swift,johnno1962d/swift,lorentey/swift,benlangmuir/swift,russbishop/swift,OscarSwanros/swift,natecook1000/swift,frootloops/swift,codestergit/swift,xedin/swift,shajrawi/swift,xwu/swift,natecook1000/swift,codestergit/swift,emilstahl/swift,bitjammer/swift,atrick/swift,xwu/swift,khizkhiz/swift,natecook1000/swift,ken0nek/swift,mightydeveloper/swift,russbishop/swift,bitjammer/swift,tinysun212/swift-windows,hughbe/swift,amraboelela/swift,dduan/swift,tkremenek/swift,devincoughlin/swift,MukeshKumarS/Swift,hughbe/swift,IngmarStein/swift,jckarter/swift,danielmartin/swift,kperryua/swift,deyton/swift,swiftix/swift.old,hughbe/swift,kentya6/swift,kstaring/swift,tardieu/swift,glessard/swift,austinzheng/swift,felix91gr/swift,Ivacker/swift,KrishMunot/swift,arvedviehweger/swift,devincoughlin/swift,brentdax/swift,jopamer/swift,modocache/swift,johnno1962d/swift,swiftix/swift,parkera/swift,tardieu/swift,deyton/swift,kstaring/swift,johnno1962d/swift,russbishop/swift,jopamer/swift,stephentyrone/swift,gribozavr/swift,tjw/swift,cbrentharris/swift,hooman/swift,jtbandes/swift,return/swift,ben-ng/swift,rudkx/swift,CodaFi/swift,tinysun212/swift-windows,sdulal/swift,kentya6/swift,tkremenek/swift,uasys/swift,therealbnut/swift,mightydeveloper/swift,OscarSwanros/swift,harlanhaskins/swift,airspeedswift/swift,austinzheng/swift,shahmishal/swift,allevato/swift,sdulal/swift,stephentyrone/swift,jopamer/swift,CodaFi/swift,frootloops/swift,sdulal/swift,mightydeveloper/swift,khizkhiz/swift,huonw/swift,harlanhaskins/swift,ken0nek/swift,arvedviehweger/swift,Jnosh/swift,karwa/swift,alblue/swift,bitjammer/swift,benlangmuir/swift,alblue/swift,austinzheng/swift,apple/swift,dreamsxin/swift,CodaFi/swift,mightydeveloper/swift,swiftix/swift.old,lorentey/swift,slavapestov/swift,bitjammer/swift,amraboelela/swift,gottesmm/swift,milseman/swift,xedin/swift,milseman/swift,allevato/swift,OscarSwanros/swift,airspeedswift/swift,therealbnut/swift,brentdax/swift,felix91gr/swift,kstaring/swift,kusl/swift,alblue/swift,manavgabhawala/swift,sdulal/swift,lorentey/swift,devincoughlin/swift,huonw/swift,jckarter/swift,lorentey/swift,return/swift,JGiola/swift,adrfer/swift,ken0nek/swift,emilstahl/swift,JGiola/swift,khizkhiz/swift,brentdax/swift,zisko/swift,djwbrown/swift,gottesmm/swift,jopamer/swift,Ivacker/swift,roambotics/swift,sschiau/swift,xedin/swift,huonw/swift,MukeshKumarS/Swift,airspeedswift/swift,zisko/swift,huonw/swift,therealbnut/swift,KrishMunot/swift,gribozavr/swift,cbrentharris/swift,hooman/swift,therealbnut/swift,gottesmm/swift,jtbandes/swift,codestergit/swift,ahoppen/swift,gribozavr/swift,Ivacker/swift,swiftix/swift.old,modocache/swift