[MacPorts] #26567: Updated yap-devel portfile

[MacPorts]

#26567: Updated yap-devel portfile
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  Reporter:  pmoura@…            |       Owner:  ryandesign@…           
      Type:  update              |      Status:  reopened               
  Priority:  Normal              |   Milestone:                         
 Component:  ports               |     Version:  1.9.1                  
Resolution:                      |    Keywords:  haspatch maintainer    
      Port:  yap-devel           |  
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Comment(by jmr@…):

 A given version+revision of a port should always install exactly the same
 thing, so you don't want to fetch the latest revision, but rather the
 particular one specified.

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Ticket URL: <https://trac.macports.org/ticket/26567#comment:12>
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