* as.c (main): On TC_A29K, call macro_init with macro_alternate

	* as.c (main): On TC_A29K, call macro_init with macro_alternate
	set to 1.
	* macro.c (get_any_string): Don't keep quotes if macro_strip_at is
	set, even if macro_alternate is set.
	(get_apost_token): If macro_strip_at, only skip kind if it is '@'.
	(sub_actual): If macro_strip_at, and kind is '@', don't look up
	the token unless it ended in '@'.
	* config/tc-a29k.c (line_separator_chars): Remove '@'.
	* doc/c-a29k.texi: Document macro usage on A29K.