[MacPorts] #50518: bug: case sensitive port names in boolean expressions

[MacPorts]

#50518: bug: case sensitive port names in boolean expressions
---------------------+----------------------------
  Reporter:  mojca   |      Owner:  neverpanic
      Type:  defect  |     Status:  accepted
  Priority:  Normal  |  Milestone:  MacPorts 2.5.0
 Component:  base    |    Version:  2.3.4
Resolution:          |   Keywords:
      Port:          |
---------------------+----------------------------
Changes (by neverpanic):

 * owner:  macports-tickets@… => neverpanic
 * status:  new => accepted
 * milestone:   => MacPorts 2.5.0


Comment:

 Can reproduce with XviD installed and the commands
 {{{
 $> port installed installed and not XviD
 $> port installed installed and not xvid
 }}}

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Ticket URL: <https://trac.macports.org/ticket/50518#comment:3>
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