'df' command displays LUKS devices as /dm-*, rather than the more convenient /dev/mapper/luks-UUID device symlink

Issue

The 'df' command shows LUKS device paths as /dev/dm-* instead of the actual mounted device name.

Here is an example of this:

$ mount | grep '/storage'
/dev/mapper/luks-39d9ee77-96ce-427d-8184-ead4f7d61d33 on /storage type ext4 (rw,nosuid,nodev,relatime,seclabel)

$ blkid | grep luks-39d9ee77-96ce-427d-8184-ead4f7d61d33
/dev/mapper/luks-39d9ee77-96ce-427d-8184-ead4f7d61d33: UUID="33d68ca3-55dc-4772-902a-298c7b5bcdf6" BLOCK_SIZE="4096" TYPE="ext4"

$ df -h 2>/dev/null | grep 33d68ca3-55dc-4772-902a-298c7b5bcdf6
/dev/dm-11               988M  2.6M  919M   1% /storage