geom.8: Improve classes list into a table

Add missing entries MD, VFS, and DISK. Refactor list into a three
column table, so the data is all visible at once, buying us ten lines
at MANWIDTH 80, and still rendering nicely at MANWIDTH 59.

PR:		292530
MFC after:	3 days
Reported by:	Slawomir Wojciech Wojtczak <vermaden@interia.pl>

1 files changed, 9 insertions, 36 deletions

diff --git a/sbin/geom/core/geom.8 b/sbin/geom/core/geom.8
index 29c6385da3f7..96db7f3a80e4 100644
--- a/sbin/geom/core/geom.8
+++ b/sbin/geom/core/geom.8
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd December 4, 2025
+.Dd February 5, 2026
 .Dt GEOM 8
 .Os
 .Sh NAME
@@ -143,41 +143,14 @@ Currently, classes aware of
 .Nm
 are:
 .Pp
-.Bl -bullet -offset indent -compact
-.It
-CACHE
-.It
-CONCAT
-.It
-ELI
-.It
-JOURNAL
-.It
-LABEL
-.It
-MIRROR
-.It
-MOUNTVER
-.It
-MULTIPATH
-.It
-NOP
-.It
-PART
-.It
-RAID
-.It
-RAID3
-.It
-SCHED
-.It
-SHSEC
-.It
-STRIPE
-.It
-UNION
-.It
-VIRSTOR
+.Bl -column "* MULTIPATH" "* MULTIPATH" "* MULTIPATH" -offset indent
+.It \(bu CACHE Ta \(bu MIRROR Ta \(bu SCHED
+.It \(bu CONCAT Ta \(bu MOUNTVER Ta \(bu SHSEC 
+.It \(bu DISK Ta \(bu MULTIPATH Ta \(bu STRIPE
+.It \(bu ELI Ta \(bu NOP Ta \(bu UNION
+.It \(bu JOURNAL Ta \(bu PART Ta \(bu VFS
+.It \(bu LABEL Ta \(bu RAID Ta \(bu VIRSTOR
+.It \(bu MD Ta \(bu RAID3
 .El
 .Sh ENVIRONMENT
 The following environment variables affect the execution of