Make SDoc an abstract type.
Make SDoc an abstract type.

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