Name: set_long - set the long description in a room

Syntax:
	#include <room2.h>
	set_long(string long_desc)

Description:
	The set_long call sets the long description in a room. The long desc-
	ription is displayed whenever a player enters a room or types 'look'.
	At the moment, the long description is not displayed if it is dark in
	the room (eg. when it is night) , but therefore there is support for
	different day and night descriptions, and later players won't get a
	line like "It is too dark.".

	The long description itself normally cosists of several lines, each
	line terminated with a linefeed ('\n'). The lines can be added together 
	with the '+' operator.

	The long description affects the long function in the room and can be
	overriden using query_long or EXTRA_LONG with extd_room.

Return value: none

Examples:
	set_long( "You are in a green and lushy meadow.\n"+
		  "You see an apple tree nearby.\n");

See also: object/long, room/set_day_desc, room/set_night_desc, room/query_long