[MacPorts] #33596: gnuplot: update to 4.6.0

[MacPorts]

#33596: gnuplot: update to 4.6.0
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 Reporter:  mojca.miklavec.lists@…          |       Owner:  macports-tickets@…                   
     Type:  update                          |      Status:  new                                  
 Priority:  Normal                          |   Milestone:                                       
Component:  ports                           |     Version:  2.0.4                                
 Keywords:                                  |        Port:  gnuplot                              
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Comment(by mojca.miklavec.lists@…):

 Unrelated, but for anyone following or reading this ticket: what would be
 the most suitable option name to make x11, qt or wxwidgets the default
 terminal instead of aquaterm?

 I would really like to change the default terminal (for me, not for
 everyone) once in future. I know how to write the code to do that, but I
 don't know how to call the options. Something like the following?
 {{{
 port install gnuplot +qt +wxwidgets +default_qt
 port install gnuplot +qt +default_x11
 }}}
 The options would then be (default_aqua), default_qt, default_wxt (or
 default_wxwidgets), default_x11, all conflicting with each other. (But all
 that is a bit ugly.)

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Ticket URL: <https://trac.macports.org/ticket/33596#comment:25>
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