Improve HsSyn pretty-printing of instance declarations (fixes Trac #7532)
Improve HsSyn pretty-printing of instance declarations (fixes Trac #7532)

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