[PATCH 1 of 2 STABLE] help: modernize the example for command registration

[Yuya Nishihara]

On Sat, 19 Jan 2019 00:29:29 -0500, Matt Harbison wrote:
> # HG changeset patch
> # User Matt Harbison <matt_harbison at yahoo.com>
> # Date 1547871184 18000
> #      Fri Jan 18 23:13:04 2019 -0500
> # Branch stable
> # Node ID 9b57d98e8fe910d033575fadeac91be1eae59f6f
> # Parent  74525c3e9476db425024f1a8573e66f0473f7a81
> help: modernize the example for command registration

Queued for stable, thanks.