[MacPorts] #49343: slime: update to 2.15

[MacPorts]

#49343: slime: update to 2.15
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  Reporter:  ryandesign@…  |      Owner:  easieste@…
      Type:  update        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.99
Resolution:  fixed         |   Keywords:  haspatch
      Port:  slime         |
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Comment (by ryandesign@…):

 Replying to [comment:2 easieste@…]:
 > N.b. as far as I understand things, we still need to increment the epoch
 field even though we are building to releases.

 The only reason why the epoch would need to be increased is if the
 MacPorts `vercmp` procedure sees the new version as older than the old
 version. For example, if the old version were "20051225" and the new
 version were "3.5", then the epoch would need to be increased, because
 otherwise MacPorts would see "3.5" as older than "20051225" (because 3 is
 less than 20051225) and would not present the port as an outdated port.
 That's not the case here: MacPorts has no trouble understanding that
 "2.15" is newer than "2.14" (because 15 is greater than 14), so no epoch
 increase was necessary. It doesn't hurt anything to increase the epoch in
 this case, but there was no reason to do so. (Now that it has been
 increased, it cannot be changed back, because the epoch may never be
 decreased.)

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Ticket URL: <https://trac.macports.org/ticket/49343#comment:4>
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