Why do I see double hyphens (dashes) in my Logical volume name ?

Issue

• Creating a "VG" named volume-group and "LV" named logical-volume, ends up with with this entry under /dev/mapper and /dev/disk/by-id as volume--group and logical--volume (double dash):

  # ls -al /dev/mapper/
  [...]
  lrwxrwxrwx.  1 root root      7 Apr 21 12:16 volume--group-logical--volume -> ../dm-2
  
  # ls -al /dev/disk/by-id/
  [...]
  lrwxrwxrwx.  1 root root      7 Apr 21 12:16 dm-name-volume--group-logical--volume -> ../../dm-2
  

• The names contain double hyphens instead of one as expected.

• The lvm names contain double dashes instead of one as expected.
• Is the - character a dash or a hyphen?