LSBlock cannot handle multi lines device item

[JoySnow]

Get this below special lsblk output case from a RHEL6 system.

The -luks-c666666c-e999-4666-8888-333333333333 (dm-0) device line was divided into two due to long device name.

LSBLK_DATA4 = """
NAME                           MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                              8:0    0 136.7G  0 disk
|-sda1                           8:1    0   500M  0 part  /boot
`-sda2                           8:2    0 136.2G  0 part
  `-luks-c666666c-e999-4666-8888-333333333333 (dm-0)
                               253:0    0 136.2G  0 crypt
    |-vg0-lv_root (dm-1)       253:1    0    26G  0 lvm   /
    |-vg0-lv_swap (dm-2)       253:2    0    16G  0 lvm   [SWAP]
    |-vg0-lv_var (dm-5)        253:5    0    20G  0 lvm   /var
    |-vg0-lv_home (dm-6)       253:6    0    30G  0 lvm   /home
    |-vg0-lv_tmp (dm-7)        253:7    0    10G  0 lvm   /tmp
    `-vg0-lv_usr (dm-8)        253:8    0    20G  0 lvm   /usr
sdb                              8:16   0   1.7T  0 disk
`-promdatavg (dm-3)            253:3    0   1.7T  0 crypt
  `-promdatavg-promdata (dm-4) 253:4    0   1.7T  0 lvm   /promdata
sr0                             11:0    1  1024M  0 rom%
"""

Current Behavior:
The current LSBlock parser will skip this device in result.

print(results.rows[1])
print(results.rows[2])
print(results.rows[3])
print(results.rows[4])

Output:

part:sda1(/boot)
part:sda2
lvm:vg0-lv_root (dm-1)(/)
lvm:vg0-lv_swap (dm-2)([SWAP])

Expected Behavior:
LSBlock parser can parse it correctly.