[commit: ghc] wip/rae's head updated: Slightly better `Coercible` errors. (7669c8a)

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

Branch 'wip/rae' now includes:

     b89c491 Always run explicitly requested ways (extra_ways) for fast runs.
     c738b12 Replace [PostTc id Type] with PostTc id [Type]
     e156361 Put stable pointer names in the name cache.
     1637e4d Driver: --make -o without Main should be an error (#10895)
     1a13551 Test #10347
     d19a77a Update user guide, fixing #10772
     d7f2ab0 Test #10770
     79b8e89 Print associated types a bit better.
     1292c17 Allow TH quoting of assoc type defaults.
     27f9186 Clarify parsing infelicity.
     93fafe0 Re-polish error messages around injective TFs.
     6a20920 Small improvement in pretty-printing constructors.
     974a762 Run simplifier only when the env is clean.
     577c3ce Refactor BranchLists.
     51c7306 Perform a validity check on assoc type defaults.
     7669c8a Slightly better `Coercible` errors.