Fix doxygen comment block in closure specializer.
Fix doxygen comment block in closure specializer.

Swift SVN r32917

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