[tor-bugs] #15541 [Tor]: 'tor --dump-config' without an opt should provide usage information

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#15541: 'tor --dump-config' without an opt should provide usage information
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     Reporter:  atagar   |      Owner:  rl1987
         Type:  defect   |     Status:  needs_review
     Priority:  trivial  |  Milestone:
    Component:  Tor      |    Version:
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by rl1987):

 Pushed one more commit that implements this.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15541#comment:5>
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