fix typo in comment defining macros #6306
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The existing comment describes macros as "formulas of the form `(forall X (= (f X) T[X]))` ... where `T[X]` does not contain `X`". This is incorrect; of course the macros' definitions are allowed to be in terms of the macros' arguments. The comment should say "...does not contain `f`" because macros can't be recursive.
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The existing comment describes macros as "formulas of the form
(forall X (= (f X) T[X]))... whereT[X]does not containX". This isincorrect; of course the macros' definitions are allowed to be in terms of
the macros' arguments. The comment should say "...does not contain
f" becausemacros can't be recursive.