slack_incoming: Stop passing around the previous body.
slack_incoming: Stop passing around the previous body.

The only operation is to append -- let that happen in the caller.

zulip/zulip,andersk/zulip,andersk/zulip,andersk/zulip,rht/zulip,rht/zulip,andersk/zulip,andersk/zulip,zulip/zulip,zulip/zulip,rht/zulip,zulip/zulip,andersk/zulip,rht/zulip,zulip/zulip,zulip/zulip,rht/zulip,rht/zulip,zulip/zulip,rht/zulip,andersk/zulip