Make Outputable.quotes do what the comments say
Make Outputable.quotes do what the comments say

Outputable.quotes claimed to drop the quotes if the enclosed thing has
a trailing single quote; but its implementation checked for
a *leading* quote.

Fixes Trac #5509

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