fix comments

Change-Id: Iee6557755e4976e023d1c04bde24e3aa1d0fd062
Reviewed-on: https://gerrit.libreoffice.org/8369
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>