User:Krinkle/Special:LanguageStats/Changes

Inside getGroupStats()

1)
Where the <tr> element is opened, add an extra attribute of "date-groupid" with the value of $g->getId().

if ( $g->isMeta() ) {
   /* Add data-ismeta="1" */

  /* Get parent/meta groups */
  /* getId() for each of them */
  /* join() with a ' ' space and put it in attribute data-parentgroups="" */
}