[MacPorts] #38664: poppler @0.22.2: +docs variant introduces circular dependency chain

[MacPorts]

#38664: poppler @0.22.2: +docs variant introduces circular dependency chain
---------------------+--------------------------------
 Reporter:  egall@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.1.3
 Keywords:           |       Port:  poppler
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 So I was trying to update the poppler port to fix the conflict between its
 `+docs` variant and its `+universal` variant (as per #38525), and in doing
 so I found that the `+docs` variant introduces a circular dependency:
 {{{
   cairo
 ...
     xrender
       xorg-libX11
 ...
         xorg-libxcb
           doxygen
 ...
             texlive
               texlive-basic
                 texlive-documentation-base
 ...
                   texlive-bin
 ...
                     poppler
 }}}
 This is similar to the dependency chain that leads to doxygen's `+docs`
 variant having a circular dependency: #37604

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Ticket URL: <https://trac.macports.org/ticket/38664>
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