Commit 2023-03-27 03:38 50c0cdf6

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feat: strengthen apply_fun capabilities (#2942) Use Lean.MVarId.congrN! rather than Lean.MVarId.congrN when proving congruence. This lets apply_fun Fintype.card at h work (note that there are Fintype instances involved, so it needs to apply Subsingleton.elim).

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