Fix comments on isValArg
Fix comments on isValArg

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