[MacPorts] #58597: When MacPorts asks a yes/no question, add an abort option

[MacPorts]

#58597: When MacPorts asks a yes/no question, add an abort option
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  Reporter:  peteswickedale  |      Owner:  (none)
      Type:  enhancement     |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  base            |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by neverpanic):

 There is an abort option, that is pressing Ctrl+C. However, that option,
 I've noticed, does not always work immediately but takes effect when you
 give any answer after pressing Ctrl+C, which is certainly sub-optimal.

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Ticket URL: <https://trac.macports.org/ticket/58597#comment:3>
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