[MacPorts] #58161: Guide does not explain that selectors use regular expressions

[MacPorts]

#58161: Guide does not explain that selectors use regular expressions
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  Reporter:  chrstphrchvz  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  guide         |    Version:  2.5.4
Resolution:                |   Keywords:
      Port:                |
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Comment (by chrstphrchvz):

 Is it really more common to use patterns here rather than a specific
 portname? Why not have a flag to enable pattern matching, and without the
 flag only do an exact match? I imagine that would be more user-friendly.
 See Perry's comment: https://github.com/macports/macports-
 ports/pull/3316#issuecomment-451458556

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Ticket URL: <https://trac.macports.org/ticket/58161#comment:4>
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