# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_append_to_file.html
+# https://www.gnu.org/software/autoconf-archive/ax_append_to_file.html
# ===========================================================================
#
# SYNOPSIS
# and this notice are preserved. This file is offered as-is, without any
# warranty.
-#serial 8
+#serial 10
AC_DEFUN([AX_APPEND_TO_FILE],[
AC_REQUIRE([AX_FILE_ESCAPES])
-printf "$2\n" >> "$1"
+printf "%s\n" "$2" >> "$1"
])