[MacPorts] #35969: py-goocanvas: adding license and correcting indentation in Portfile

[MacPorts]

#35969: py-goocanvas: adding license and correcting indentation in Portfile
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  Reporter:  alexander.afanasyev@…         |       Owner:  dports@…           
      Type:  enhancement                   |      Status:  reopened           
  Priority:  Normal                        |   Milestone:                     
 Component:  ports                         |     Version:                     
Resolution:                                |    Keywords:  haspatch maintainer
      Port:  py-goocanvas                  |  
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Comment(by alexander.afanasyev@…):

 oops.  Didn't mean to do that.  Diffed with my old Portfile version by
 accident.  Attaching two more patches, one only for whitespace (and small
 reorganization), another one with small functional change (depends_build
 replaced with depends_build-append).    Also, I'm not sure whether
 pkgconfig dependency is automatically selected with "use_configure yes" or
 not.

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Ticket URL: <https://trac.macports.org/ticket/35969#comment:6>
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