Comment regular expression is fragile

[ripla]

In some comments in our repository the comments regexp in comments.go fails to match at all, and sync fails since fields is empty.

As a ugly quickfix I had to add

if len(fields) != 5 {
		log.Debug("Failed to update JIRA comment for ", jIssue.ID)
		return nil
	}

To UpdateComment to make sync work. Also writing the config to home failed on macOS, but worked when I specified a full file path. I can add a separate issue about that if needed.