[commit: ghc] wip/T9968's head updated: Improve tests (d964bcf)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/T9968' now includes:

     36f2ad5 Comments only
     5ab7518 Improve typechecking of RULEs, to account for type wildcard holes
     6fa285d Move comments about evaluating the message to the top of the module
     49d99eb Fix typo in error message
     555eef1 Remove RAWCPP_FLAGS (Task #9094)
     310b636 Add missing va_end to va_start
     a82364c Don't truncate traceEvents to 512 bytes (#8309)
     e7fab33 Improve outdated ghc-pkg cache warning (#9606)
     08102b3 Delete vestigial external core code (#9402)
     1b82619 Add configurable verbosity level to hpc
     91d9530 Revert "Eta-expand argument to foldr in mapM_ for []"
     9caf71a Do not clobber CPPFLAGS nor LDFLAGS, fixes #10093
     6d17125 runghc: be explicit about ghc version (#9054)
     32d1a8a Cleanup ghc-pkg
     35d464b Typo in function name
     e9d72ce Fix #10045
     5782905 Make the implementation of DeriveAnyClass more robust
     d964bcf Improve tests