[MacPorts] #26028: Add feature to show changes between port versions

[MacPorts]

#26028: Add feature to show changes between port versions
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 Reporter:  sewebster@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement          |      Status:  new                                  
 Priority:  Low                  |   Milestone:                                       
Component:  base                 |     Version:                                       
 Keywords:                       |        Port:                                       
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Comment(by sewebster@…):

 Wow, thats fantastic!  Thanks.

 Possible items for future versions could be:
  * support more than one port argument
  * support pseudoports
  * or, I guess a subset of the previous point, make it easy to spit out
 the changes to all outdated ports, e.g.
 {{{
 port echo outdated | cut -f 1 -d" " | xargs -n 1 ./port-whatsnew.sh
 }}}

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Ticket URL: <http://trac.macports.org/ticket/26028#comment:7>
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