Add flag to command description.
@@ -231,7 +231,8 @@ These flags are:\n\n\
* -m/--modifier <modifier>: a world generator modifier to use. Can be specified multiple times for multiple modifiers.\n\
* --di/--difficulty <difficulty>: the initial world difficulty. Defaults to normal.\n\
* --gm/--gamemode <gamemode>: the default game mode for players in the world. Defaults to survival.\n\
-* -s/--seed <seed>: The seed to use to generate the world. If not specified, a random seed will be used.\n\n\
+* -s/--seed <seed>: The seed to use to generate the world. If not specified, a random seed will be used.\n\
+* -i: Indicates that this world might exist and can be imported.\n\n\
The difficulty and the game mode can be changed after the world is generated.
world.gamerule.desc=Displays a world''s game rules.
