dnl @ ../doc/m4.texinfo:3437: 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.
substr(`gnus, gnats, and armadillos', `6')
dnl @result{}gnats, and armadillos
substr(`gnus, gnats, and armadillos', `6', `5')
dnl @result{}gnats