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1974
# m4_defun'd, we can add a parameter, similar to the third parameter
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m4_define([m4_defun_init],
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[$2[]_m4_popdef(]m4_dquote($[0])[)m4_indir(]m4_dquote($[0])dnl
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[m4_if(]m4_dquote($[#])[, [0], [], ]m4_dquote([,$]@)[))], [m4_pushdef])])