dnl ../doc/m4.texinfo:1860: Origin of test
define(`comment', `COMMENT')
dnl @result{}
# A normal comment
dnl @result{}# A normal comment
changecom(`/*', `*/')
dnl @result{}
# Not a comment anymore
dnl @result{}# Not a COMMENT anymore
But: /* this is a comment now */ while this is not a comment
dnl @result{}But: /* this is a comment now */ while this is not a COMMENT