usb-device-manager: Minor style fixes

Fix space.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Victor Toso <victortoso@redhat.com>
2 jobs for master in 3 minutes and 18 seconds (queued for 50 seconds)
Status Job ID Name Coverage
  Test
passed #414316
fedora

00:03:18

passed #414317
windows

00:02:07