[pmwiki-users] [= =] question

[Hans]

Is there a reason for the [=  =] brackets around $ChangeSummery in
pmwiki.php? It reads (line 61+):

$RecentChangesFmt['$SiteGroup.AllRecentChanges'] =
    '* [[$Group.$Name]] [[$FullName?action=diff|[-(diff)-]]]
    . . . $CurrentTime $[by] $AuthorLink: [=$ChangeSummary=]';
$RecentChangesFmt['$Group.RecentChanges'] =
    '* [[$Group/$Name]] [[$FullName?action=diff|[-(diff)-]]]
    . . . $CurrentTime $[by] $AuthorLink: [=$ChangeSummary=]';

And how would I display such code which includes [= =] as code on a
wiki page? Usually I put blocks of code in with

 [=
   code here..
   more code
=]

but this is upset by the [= =] in the code.

-- 
Best regards,
 Hans