#9358 NORM Not Tri: diffs in notification emails are broken

[Zarro Boogs per Child]

#9358: diffs in notification emails are broken
--------------------------+-------------------------------------------------
 Reporter:  sascha_silbe  |                 Owner:  cjb          
     Type:  defect        |                Status:  new          
 Priority:  normal        |             Milestone:  Not Triaged  
Component:  wikiserver    |               Version:  not specified
 Keywords:                |           Next_action:  never set    
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
--------------------------+-------------------------------------------------
 Notification emails about changed pages contain the following text as-is
 instead of the actual diff:

 > Below is the difference between the last two revisions:
 >
 > $PAGEDIFF

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Ticket URL: <http://dev.laptop.org/ticket/9358>
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