stdlib/Hashable: add a doc comment about hashValue/equality comparison consistency requirement
stdlib/Hashable: add a doc comment about hashValue/equality comparison
consistency requirement

Swift SVN r20538

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