Describe the bug
We used Slack channel IDs to specify the --slackoutput parameter. Recently that stopped working due to this change.

It appends a '#' in front of the value of --slackoutput if it isn't there already. However, this makes it impossible to provide a Slack channel ID rather than a slack channel name. This is inconvenient because if a channel is renamed krr scripts need to be updated, possibly in multiple places. Furthermore, with this change, there is no way to provide a slack channel ID rather than a slack channel name.

To Reproduce
Steps to reproduce the behavior:

1. Run krr using --slackoutput "SLACKCHANNELID"

Expected behavior
The krr report should be sent to the slack channel that has that ID. Instead, an error message appears:

The server responded with: {'ok': False, 'error': 'channel_not_found'}

Are you interested in contributing a fix for this?
Yes - already submitted:
#461