Thread:Project:Support desk/deleteOldRevisions.php and rebuildall.php

At Manual:DeleteOldRevisions.php, it suddenly mentions rebuildall.php in the Example section. The section ends with "NB: The rebuildall.php can take long...". So, is rebuildall.php required before deleteOldRevisions.php is being used? If not, then maybe the Example section should mention what exactly the example is all about. Someone on IRC said that (I think it was) rebuildrecentchanges.php could be used instead, but it's still unclear why the example includes information about a rebuild script. If calling such a script is required it should be mentioned outside the Example section. If it's not required, then the Example section is going beyond just giving an example for the usage of deleteOldRevisions.php and it would be useful if some additional text would explain what the example is all about. Thanks in advance for information you can give me.