The prompt now shows the current breakpoint
The prompt now shows the current breakpoint

when stopped at a breakpoint we now get:

  [Test3.hs:2:17-30] *Main>

when there is a stack of breakpoints, we get:

  ... [Test3.hs:2:17-30] *Main>

showing just the topmost one.  Better suggestions are welcome, but
this seems not too bad to me.

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