[MacPorts] #59538: github portgroup doesn't work with default master_sites from other portgroups

[MacPorts]

#59538: github portgroup doesn't work with default master_sites from other
portgroups
---------------------+--------------------
  Reporter:  jmroot  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
---------------------+--------------------

Comment (by jmroot):

 The issue is occurring when the python portgroup is included after the
 github one. The new default overwrites the previous one.

-- 
Ticket URL: <https://trac.macports.org/ticket/59538#comment:6>
MacPorts <https://www.macports.org/>
Ports system for macOS