dnl @ ../doc/m4.texi:2313: Origin of test
dnl @ expected status: 0
dnl @ extra options: 
dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
dnl @ Foundation, Inc.
dnl @ This file is free software; the Free Software Foundation
dnl @ gives unlimited permission to copy and/or distribute it
dnl @ with or without modifications, as long as this notice
dnl @ is preserved.
define(`foo', a'a)
dnl @result{}
define(`a', `A')
dnl @result{}
define(`echo', `$@')
dnl @result{}
foo
dnl @result{}A'A
defn(`foo')
dnl @result{}aA'
echo(foo)
dnl @result{}AA'