[commit: ghc] wip/T8584's head updated: Add test cases (8ea3a36)

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

Branch 'wip/T8584' now includes:

     8e66365 Unlit overlooked GHC/Conc/Sync.lhs
     e2769df Use (.) and id from Base in Control.Applicative
     8710136 Move Data.Functor.Identity from transformers to base
     7ae596a Typo fix; Trac #9787
     4923cea Define list monad operations using comprehensions
     e567130 De-bias Data.Foldable and improve docstrings
     97420b0 Comments only (on recursive dictionaries)
     ed57ea4 Test Trac #9662
     e9d3e28 Comments only
     7cbe34f Improve documentation of -ticky a little
     13817f0 Test Trac #9077
     2b67b8f Test Trac #7862
     76d47ed Add stderr for T9662
     fcfc87d Disable T4801/peak_megabytes_allocated
     c774b28 Implement new integer-gmp2 from scratch (re #9281)
     a9e5e5d nlHsTyApps: for applying a function both on type- and term-level arguments
     03fe096 Renamer for PatSynSigs: handle type variable bindings
     2f2639d tcCheckPatSynDecl: typechecker for pattern synonyms with user-supplied type signatures
     faa9d47 Change output of ':i' for pattern synonyms to be in sync with new syntax
     353d11f Use user-supplied type variables (when available) in pattern synonym type signatures
     24ef4c6 Update baseline shift/reduce conflict number
     b99afa8 Add parser for pattern synonym type signatures. Syntax is of the form
     8ea3a36 Add test cases