Empty data types should not be "trimmed" by TidyPgm
Empty data types should not be "trimmed" by TidyPgm

That in turn means that you can derive Show etc in other modules,
fixing Trac #6031

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