[MacPorts] #46500: hs-parsec: update to 3.1.7

[MacPorts]

#46500: hs-parsec: update to 3.1.7
-------------------------+----------------------
  Reporter:  joelfred@…  |      Owner:  cal@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.3
Resolution:              |   Keywords:  haspatch
      Port:  hs-parsec   |
-------------------------+----------------------
Changes (by ryandesign@…):

 * owner:  macports-tickets@… => cal@…
 * cc: cal@… (removed)


Comment:

 That magic is called "subports". We can't accept a standalone portfile for
 this, since as you've pointed out the port is already a subport of
 haskell-platform. Update the relevant part of haskell-platform instead,
 then attach a unified diff of your changes.

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Ticket URL: <https://trac.macports.org/ticket/46500#comment:3>
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