'amend' and 'create' were not listed alphabetically; hoist them
earlier.  Separate the @end table block to make it easier to
copy-and-paste the addition of future sub-commands.

Signed-off-by: Eric Blake <eblake@redhat.com>

Message-Id: <20170803163353.19558-2-eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>