Make sure zipWithFB has arity 2
Make sure zipWithFB has arity 2

It gets 2 arguments in the "zipWith" rule but its arity was higher and the new
inliner didn't inline it sometimes, for instance here:

mpp ::  [Double] -> [Double] -> [Double] -> [Double] -> [Double]
mpp as bs cs ds = zipWith (*) (zipWith (+) as bs) (zipWith (+) cs ds)
 
This was a regression vs. 6.10.

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