[commit: ghc] wip/lazy-instance-matching's head updated: InstEnv: Ensure that instance visibility check is lazy (fe94e90)

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

Branch 'wip/lazy-instance-matching' now includes:

     d213ab3 Fix misspellings of the word "instance" in comments
     3fa3fe8 Make DeriveFunctor work with unboxed tuples
     514c4a4 Fix Template Haskell reification of unboxed tuple types
     1fc41d3 Make okConIdOcc recognize unboxed tuples
     3822b65 TcInteract: Add braces to matchClassInst trace output
     fe94e90 InstEnv: Ensure that instance visibility check is lazy