Allow setoid rewrite to rewrite in pattern-matching scrutinees or branches when constructors have no arguments, requiring the output relation of the rewrite to be leibniz equality.
Allow setoid rewrite to rewrite in pattern-matching scrutinees or
branches when constructors have no arguments, requiring the output
relation of the rewrite to be leibniz equality.


git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@12314 85f007b7-540e-0410-9357-904b9bb8a0f7

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