disk list: fix minor usage renderer issue

If there is extended information, the variable is overwritten anyways.
Avoid appending an extra space if there is no extended information.

Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
This commit is contained in:
Fabian Ebner 2021-04-23 12:14:56 +02:00 committed by Thomas Lamprecht
parent b46ad78c2d
commit f38bbed7bf