Lfun:	query_info - get information special from an object

Synopsis:
	string query_info()

Description:
	Declare this function if the object has some hidden information. A
	scroll of identify would call query_info() to find out.

	All the standard objects have a function set_info(), to enable
	setting an information string.

Return value:
	A string containing the information.

Examples:
	query_info() { return "a scroll of healing"; }

See also: object/set_info