[Varnish] #420: Document string concatenation

[Varnish]

#420: Document string concatenation
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 Reporter:  perbu          |        Owner:        
     Type:  defect         |       Status:  closed
 Priority:  normal         |    Milestone:        
Component:  documentation  |      Version:  trunk 
 Severity:  normal         |   Resolution:  fixed 
 Keywords:                 |  
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Changes (by tfheen):

  * status:  new => closed
  * resolution:  => fixed

Comment:

 (In [4331]) Document string concatenation

 Fixes #420

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Ticket URL: <http://varnish.projects.linpro.no/ticket/420#comment:2>
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