[test] Missed a spot in previous commit.
[test] Missed a spot in previous commit.

NSMutableDictionary's subscript now accepts nil values for delete, just like
Swift.Dictionary's does.

Swift SVN r29748

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