docs: Fix #10416
docs: Fix #10416

Summary:
Apparently this was broken by b30c6012c7552c874281050d40e5a59012b2c5e7,
but I can't reproduce the issue described there at all.

Signed-off-by: Austin Seipp <austin@well-typed.com>

Test Plan: Use my eyes to read the resulting user manual.

Reviewers: hvr, thomie

Reviewed By: thomie

Subscribers: bgamari, thomie

Differential Revision: https://phabricator.haskell.org/D958

GHC Trac Issues: #10416

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