dnl @ ../doc/m4.texinfo:2586: Origin of test
dnl @ Copyright (C) 2006 Free Software Foundation
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(`a', `b')
dnl @result{}
«a»
dnl @result{}«b»
changecom(`«', `»')
dnl @result{}
«a»
dnl @result{}«a»