Document explicit import/export of data constructors (Trac #8753)
Document explicit import/export of data constructors (Trac #8753)

I also added sub-sections to the pattern synonym documentation

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