Templates list in help text of object new

License: MIT
Signed-off-by: Dylan Powers <dylan.kyle.powers@gmail.com>

core/commands/object.go

@@ -368,6 +368,9 @@ var objectNewCmd = &cmds.Command{
 By default it creates and returns a new empty merkledag node, but
 you may pass an optional template argument to create a preformatted
 node.
+
+Available templates:
+	* unixfs-dir
 `,
 	},
 	Arguments: []cmds.Argument{