vty: Fix documentation of 'show asciidoc counters' VTY command

VTY documentations strings follow a certain structure, and we need to
follow that to make the interactive help work.

Change-Id: I0bb0bda68dbbf9995338ec555ff99d73a223162c
Reviewed-on: https://gerrit.osmocom.org/276
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Tested-by: Harald Welte <laforge@gnumonks.org>
1 file changed