[MacPorts] #31392: sane-backends: clean up variant names

[MacPorts]

#31392: sane-backends: clean up variant names
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 Reporter:  ryandesign@…             |       Owner:  aguynamedryan+sane@…        
     Type:  enhancement              |      Status:  new                         
 Priority:  Normal                   |   Milestone:                              
Component:  ports                    |     Version:  2.0.3                       
 Keywords:                           |        Port:  sane-backends               
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Comment(by aguynamedryan+macports@…):

 I've taken a stab at this, but I'm a little shaky on variants.

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Ticket URL: <https://trac.macports.org/ticket/31392#comment:1>
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