[commit: ghc] wip/T9732's head updated: Apply compulsory unfoldings during desugaring (3df7ad1)

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

Branch 'wip/T9732' 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
     53c0120 Fix typo in panic message
     3bfd4d8 Binding things matched by an unboxed pattern synonym should require a bang
     3cb2a48 If pattern synonym is bidirectional and its type is some unboxed type T#, generate a worker function of type Void# -> T#, and redirect the wrapper (via a compulsory unfolding) to the worker.
     3df7ad1 Apply compulsory unfoldings during desugaring