* Makefile.util.def (grub_script_gettext): New test.
	* grub-core/script/execute.c (parse_string): New function.
	(gettext_append): Likewise.
	(grub_script_arglist_to_argv): Use gettext_append.
	* grub-core/script/yylex.l: Fix slash and newline handling in $"...".
	* tests/grub_script_gettext.in: New file.