dnl @ ../doc/m4.texinfo:6015: 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. patsubst(`abc') dnl @error{}m4:stdin:1: Warning: too few arguments to builtin `patsubst' dnl @result{}abc patsubst(`abc', `') dnl @result{}abc patsubst(`abc', `', `\\-') dnl @result{}\-a\-b\-c\-