Tons of error message wibbles

tests/arrows/should_fail/T5380.stderr

tests/arrows/should_fail/arrowfail001.stderr

tests/deriving/should_fail/T5287.hs

tests/deriving/should_fail/T5287.stderr

tests/deriving/should_fail/drvfail002.stderr

tests/gadt/T3169.stderr

tests/generics/GenCannotDoRep0.stderr

tests/ghci/scripts/Defer02.stderr

tests/indexed-types/should_fail/GADTwrong1.stderr

tests/indexed-types/should_fail/T1900.stderr

tests/indexed-types/should_fail/T2627b.stderr

tests/indexed-types/should_fail/T3330c.stderr

tests/indexed-types/should_fail/T3440.stderr

tests/module/mod54.stderr

tests/polykinds/T6054.stderr

tests/simplCore/should_run/T3591.stderr

tests/th/T5358.stderr

tests/typecheck/should_compile/FD2.stderr

tests/typecheck/should_compile/FD3.stderr

tests/typecheck/should_compile/tc141.stderr