blkid: remove extra trailing spaces in output

$  blkid | egrep -i 'sda.*label' | cat -A
/dev/sda2: UUID="8382f307-fb43-489f-ab38-8d4cf37ca88c" SEC_TYPE="ext2" TYPE="ext3" LABEL="test" $
/dev/sda5: UUID="0b46d673-8c23-4709-b92c-3fdf460e1dd4" TYPE="ext3" LABEL="rescue" SEC_TYPE="ext2" $
/dev/sda6: UUID="cb9d814f-d885-435b-8e6d-ac17c0ac5aa1" TYPE="ext3" LABEL="root" $
/dev/sda8: UUID="1e2851bd-cc6f-4d72-bf9f-c6fa754155b1" TYPE="ext3" LABEL="data" SEC_TYPE="ext2" $
/dev/sda9: UUID="d16a2f42-9a50-4489-a788-8624c832a7f3" TYPE="ext3" LABEL="storage" SEC_TYPE="ext2" $
/dev/sda7: TYPE="swap" LABEL="swap" UUID="8393acfa-d4bd-40fc-8eb9-5ccd8d85e103" $

Addresses: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=586179
Signed-off-by: Karel Zak <kzak@redhat.com>