INPUT
	TYPE ANY

OUTPUT
	TYPE ANY
	DESC Trimed content

ARGUMENT
	AMBIGUOUS-AS-WIDE
	AMBI-AS-WIDE
		Counter ambiguous width characters' width as 2
	$Integer (mandatory)
		The width of the desired trim

EXAMPLE
	> echo ˋˊ這是個很長的字串啊啊啊 | bsdconv "utf-8:trim-width#22&ambi-as-wide:utf-8"
	ˋˊ這是個很長的字串啊
	> echo ˋˊ這是個很長的字串啊啊啊 | bsdconv utf-8:trim-width#22:utf-8
	ˋˊ這是個很長的字串啊啊
	> echo 三長兩短ˊˋ3長2短 | bsdconv utf-8:trim-width#10&ambiguous-as-wide:utf-8
