Whether the "By" column can be removed from the generated change report when no dev attribute assigned in the changes.xml file

We work on and release the application as a team in our situation, so these is not necessary to put the team name in the "dev" attribute in the action elements, so the elements is similar as this one, <action type="fix" date="2013-04-02">Fix something</action>, but the "by" column will still be generated even the "dev" attribute is omitted, we are not sure whether this is a bug but we think this can be improved.