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(include-book "centaur/getopt/portcullis" :dir :system)
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(include-book "centaur/nrev/portcullis" :dir :system)
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(include-book "centaur/fty/portcullis" :dir :system)
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(defmacro multi-union-eq (x y &rest rst)
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(xxxjoin 'union-eq (list* x y rst)))