Trivial comment fix. (#8358)
Trivial comment fix. (#8358)

Version of Happy required is now 1.19.

ml9951/ghc,shlevy/ghc,lukexi/ghc-7.8-arm64,vTurbine/ghc,snoyberg/ghc,gridaphobe/ghc,shlevy/ghc,bitemyapp/ghc,forked-upstream-packages-for-ghcjs/ghc,anton-dessiatov/ghc,vTurbine/ghc,christiaanb/ghc,wxwxwwxxx/ghc,mettekou/ghc,mfine/ghc,nkaretnikov/ghc,ml9951/ghc,ezyang/ghc,fmthoma/ghc,sdiehl/ghc,olsner/ghc,da-x/ghc,oldmanmike/ghc,mfine/ghc,acowley/ghc,TomMD/ghc,nathyong/microghc-ghc,nkaretnikov/ghc,AlexanderPankiv/ghc,da-x/ghc,da-x/ghc,nushio3/ghc,hferreiro/replay,bitemyapp/ghc,tibbe/ghc,tjakway/ghcjvm,mettekou/ghc,sgillespie/ghc,green-haskell/ghc,sgillespie/ghc,nushio3/ghc,vTurbine/ghc,mfine/ghc,sgillespie/ghc,AlexanderPankiv/ghc,AlexanderPankiv/ghc,ezyang/ghc,tjakway/ghcjvm,sgillespie/ghc,ghc-android/ghc,urbanslug/ghc,wxwxwwxxx/ghc,acowley/ghc,mcschroeder/ghc,ghc-android/ghc,acowley/ghc,frantisekfarka/ghc-dsi,ryantm/ghc,tjakway/ghcjvm,forked-upstream-packages-for-ghcjs/ghc,TomMD/ghc,da-x/ghc,nathyong/microghc-ghc,christiaanb/ghc,tjakway/ghcjvm,christiaanb/ghc,AlexanderPankiv/ghc,oldmanmike/ghc,nkaretnikov/ghc,tibbe/ghc,wxwxwwxxx/ghc,ml9951/ghc,oldmanmike/ghc,ezyang/ghc,tibbe/ghc,mcschroeder/ghc,nathyong/microghc-ghc,holzensp/ghc,frantisekfarka/ghc-dsi,ezyang/ghc,siddhanathan/ghc,olsner/ghc,nathyong/microghc-ghc,hferreiro/replay,lukexi/ghc,mfine/ghc,oldmanmike/ghc,snoyberg/ghc,gcampax/ghc,fmthoma/ghc,hferreiro/replay,gcampax/ghc,TomMD/ghc,gridaphobe/ghc,jstolarek/ghc,forked-upstream-packages-for-ghcjs/ghc,lukexi/ghc,acowley/ghc,urbanslug/ghc,snoyberg/ghc,ghc-android/ghc,wxwxwwxxx/ghc,sdiehl/ghc,vTurbine/ghc,olsner/ghc,shlevy/ghc,gcampax/ghc,olsner/ghc,nushio3/ghc,spacekitteh/smcghc,ryantm/ghc,AlexanderPankiv/ghc,ghc-android/ghc,GaloisInc/halvm-ghc,elieux/ghc,anton-dessiatov/ghc,vikraman/ghc,green-haskell/ghc,wxwxwwxxx/ghc,christiaanb/ghc,oldmanmike/ghc,urbanslug/ghc,jstolarek/ghc,hferreiro/replay,tjakway/ghcjvm,GaloisInc/halvm-ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,mfine/ghc,christiaanb/ghc,lukexi/ghc-7.8-arm64,mettekou/ghc,shlevy/ghc,lukexi/ghc-7.8-arm64,spacekitteh/smcghc,sdiehl/ghc,snoyberg/ghc,gridaphobe/ghc,gridaphobe/ghc,vikraman/ghc,bitemyapp/ghc,siddhanathan/ghc,holzensp/ghc,oldmanmike/ghc,sgillespie/ghc,da-x/ghc,siddhanathan/ghc,tjakway/ghcjvm,wxwxwwxxx/ghc,siddhanathan/ghc,ml9951/ghc,jstolarek/ghc,anton-dessiatov/ghc,ryantm/ghc,forked-upstream-packages-for-ghcjs/ghc,gcampax/ghc,urbanslug/ghc,vikraman/ghc,mettekou/ghc,mettekou/ghc,anton-dessiatov/ghc,spacekitteh/smcghc,fmthoma/ghc,hferreiro/replay,gcampax/ghc,gridaphobe/ghc,vikraman/ghc,TomMD/ghc,forked-upstream-packages-for-ghcjs/ghc,nkaretnikov/ghc,nathyong/microghc-ghc,mcschroeder/ghc,vTurbine/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,nushio3/ghc,gcampax/ghc,acowley/ghc,ml9951/ghc,tibbe/ghc,nushio3/ghc,frantisekfarka/ghc-dsi,christiaanb/ghc,jstolarek/ghc,siddhanathan/ghc,shlevy/ghc,spacekitteh/smcghc,gcampax/ghc,mettekou/ghc,sdiehl/ghc,elieux/ghc,siddhanathan/ghc,forked-upstream-packages-for-ghcjs/ghc,nathyong/microghc-ghc,mcschroeder/ghc,holzensp/ghc,vikraman/ghc,nkaretnikov/ghc,snoyberg/ghc,olsner/ghc,ezyang/ghc,nathyong/microghc-ghc,lukexi/ghc,holzensp/ghc,shlevy/ghc,tibbe/ghc,frantisekfarka/ghc-dsi,sgillespie/ghc,ryantm/ghc,fmthoma/ghc,TomMD/ghc,oldmanmike/ghc,urbanslug/ghc,ghc-android/ghc,green-haskell/ghc,lukexi/ghc,fmthoma/ghc,mettekou/ghc,forked-upstream-packages-for-ghcjs/ghc,GaloisInc/halvm-ghc,gridaphobe/ghc,siddhanathan/ghc,christiaanb/ghc,elieux/ghc,ryantm/ghc,elieux/ghc,da-x/ghc,holzensp/ghc,lukexi/ghc,sgillespie/ghc,nushio3/ghc,vikraman/ghc,anton-dessiatov/ghc,jstolarek/ghc,ml9951/ghc,vikraman/ghc,olsner/ghc,mcschroeder/ghc,ezyang/ghc,lukexi/ghc-7.8-arm64,green-haskell/ghc,mcschroeder/ghc,GaloisInc/halvm-ghc,anton-dessiatov/ghc,fmthoma/ghc,mfine/ghc,frantisekfarka/ghc-dsi,tjakway/ghcjvm,snoyberg/ghc,gridaphobe/ghc,ml9951/ghc,da-x/ghc,nushio3/ghc,nkaretnikov/ghc,mfine/ghc,ezyang/ghc,green-haskell/ghc,vTurbine/ghc,anton-dessiatov/ghc,hferreiro/replay,ghc-android/ghc,olsner/ghc,elieux/ghc,shlevy/ghc,ml9951/ghc,spacekitteh/smcghc,GaloisInc/halvm-ghc,snoyberg/ghc,elieux/ghc,acowley/ghc,bitemyapp/ghc,vTurbine/ghc,sdiehl/ghc,sdiehl/ghc,urbanslug/ghc,bitemyapp/ghc,ghc-android/ghc,urbanslug/ghc,hferreiro/replay,AlexanderPankiv/ghc,TomMD/ghc,TomMD/ghc,GaloisInc/halvm-ghc,elieux/ghc,mcschroeder/ghc,acowley/ghc,fmthoma/ghc,lukexi/ghc-7.8-arm64,AlexanderPankiv/ghc