A little tidying up in ErrUtils
A little tidying up in ErrUtils

This module is a disorganised mess.

For example, there is literally *no* documentation of what the *seven*
different forms of 'Severity' are intended to connote.

Anyway this patch makes a tiny step by not exporting unused functions
pprMsgBag and isWarning, and a little bit of internal refactoring

AlexanderPankiv/ghc,mettekou/ghc,mettekou/ghc,mcschroeder/ghc,TomMD/ghc,snoyberg/ghc,tjakway/ghcjvm,mettekou/ghc,urbanslug/ghc,anton-dessiatov/ghc,sdiehl/ghc,da-x/ghc,gcampax/ghc,christiaanb/ghc,TomMD/ghc,TomMD/ghc,gridaphobe/ghc,christiaanb/ghc,ghc-android/ghc,siddhanathan/ghc,acowley/ghc,mfine/ghc,sgillespie/ghc,siddhanathan/ghc,vikraman/ghc,AlexanderPankiv/ghc,TomMD/ghc,acowley/ghc,snoyberg/ghc,mcschroeder/ghc,GaloisInc/halvm-ghc,nkaretnikov/ghc,anton-dessiatov/ghc,wxwxwwxxx/ghc,ghc-android/ghc,tjakway/ghcjvm,nkaretnikov/ghc,sgillespie/ghc,oldmanmike/ghc,ml9951/ghc,mfine/ghc,tjakway/ghcjvm,ml9951/ghc,christiaanb/ghc,snoyberg/ghc,shlevy/ghc,gridaphobe/ghc,oldmanmike/ghc,ghc-android/ghc,shlevy/ghc,mcschroeder/ghc,nkaretnikov/ghc,olsner/ghc,nkaretnikov/ghc,olsner/ghc,mcschroeder/ghc,mcschroeder/ghc,ezyang/ghc,green-haskell/ghc,green-haskell/ghc,shlevy/ghc,gcampax/ghc,ml9951/ghc,gcampax/ghc,anton-dessiatov/ghc,nushio3/ghc,elieux/ghc,sdiehl/ghc,urbanslug/ghc,fmthoma/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,siddhanathan/ghc,tjakway/ghcjvm,mfine/ghc,gridaphobe/ghc,vTurbine/ghc,TomMD/ghc,nushio3/ghc,AlexanderPankiv/ghc,tjakway/ghcjvm,christiaanb/ghc,acowley/ghc,urbanslug/ghc,gridaphobe/ghc,mcschroeder/ghc,nushio3/ghc,mettekou/ghc,GaloisInc/halvm-ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,acowley/ghc,olsner/ghc,olsner/ghc,wxwxwwxxx/ghc,oldmanmike/ghc,siddhanathan/ghc,ezyang/ghc,fmthoma/ghc,elieux/ghc,urbanslug/ghc,acowley/ghc,elieux/ghc,oldmanmike/ghc,tjakway/ghcjvm,oldmanmike/ghc,da-x/ghc,ml9951/ghc,elieux/ghc,fmthoma/ghc,vTurbine/ghc,GaloisInc/halvm-ghc,elieux/ghc,green-haskell/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,wxwxwwxxx/ghc,GaloisInc/halvm-ghc,TomMD/ghc,shlevy/ghc,wxwxwwxxx/ghc,fmthoma/ghc,vTurbine/ghc,mfine/ghc,gridaphobe/ghc,vTurbine/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,gcampax/ghc,nkaretnikov/ghc,siddhanathan/ghc,ghc-android/ghc,wxwxwwxxx/ghc,vikraman/ghc,snoyberg/ghc,christiaanb/ghc,oldmanmike/ghc,siddhanathan/ghc,shlevy/ghc,ml9951/ghc,vTurbine/ghc,da-x/ghc,gridaphobe/ghc,gcampax/ghc,da-x/ghc,GaloisInc/halvm-ghc,nushio3/ghc,sgillespie/ghc,anton-dessiatov/ghc,sdiehl/ghc,ezyang/ghc,nushio3/ghc,gridaphobe/ghc,urbanslug/ghc,fmthoma/ghc,olsner/ghc,da-x/ghc,mettekou/ghc,ezyang/ghc,TomMD/ghc,ml9951/ghc,vTurbine/ghc,mettekou/ghc,fmthoma/ghc,snoyberg/ghc,christiaanb/ghc,ezyang/ghc,vikraman/ghc,olsner/ghc,vikraman/ghc,sgillespie/ghc,ml9951/ghc,da-x/ghc,mfine/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,nushio3/ghc,sdiehl/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,elieux/ghc,green-haskell/ghc,snoyberg/ghc,vikraman/ghc,mettekou/ghc,fmthoma/ghc,AlexanderPankiv/ghc,sgillespie/ghc,gcampax/ghc,mfine/ghc,elieux/ghc,mcschroeder/ghc,vikraman/ghc,sgillespie/ghc,vTurbine/ghc,christiaanb/ghc,ghc-android/ghc,ezyang/ghc,shlevy/ghc,gcampax/ghc,acowley/ghc,shlevy/ghc,ghc-android/ghc,ml9951/ghc,snoyberg/ghc,sgillespie/ghc,ezyang/ghc,nushio3/ghc,sdiehl/ghc,olsner/ghc,wxwxwwxxx/ghc,vikraman/ghc,urbanslug/ghc,oldmanmike/ghc,mfine/ghc,anton-dessiatov/ghc,ghc-android/ghc,nkaretnikov/ghc,da-x/ghc,acowley/ghc,anton-dessiatov/ghc,green-haskell/ghc,urbanslug/ghc