dnl ../doc/m4.texinfo:1062: Origin of test
define(`echo1', `$*')
dnl @result{}
define(`echo2', `$@')
dnl @result{}
define(`foo', `This is macro `foo'.')
dnl @result{}
echo1(foo)
dnl @result{}This is macro This is macro foo..
echo2(foo)
dnl @result{}This is macro foo.