WikiBugs/EditsAreIndetical

There's no information when someone try to save pages and really there's no changes in edit. This is a warning message, too.

sub DoPost {
...
$preview = 1  if (&GetParam("Preview", "") ne "");
  if (!$preview && ($old eq $string)) {  # No changes (ok for preview)
    &ReleaseLock();
    - &ReBrowsePage($id, "", 1);
    - return;
    + print T('Edits are identical --nothing done');
    + GetFooterText($id);
    return;
  }
  if (($UserID > 399) || ($Section{'id'} > 399))  {
...

--JuanmaMP