[tor-bugs] #31677 [Core Tor/Tor]: Add usage help option to git scripts

[Tor Bug Tracker & Wiki]

#31677: Add usage help option to git scripts
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     Reporter:  teor           |      Owner:  teor
         Type:  defect         |     Status:  assigned
     Priority:  Medium         |  Milestone:  Tor: 0.4.2.x-final
    Component:  Core Tor/Tor   |    Version:  Tor: unspecified
     Severity:  Normal         |   Keywords:  git-scripts, dev-tools
Actual Points:  0.1            |  Parent ID:
       Points:  0.1            |   Reviewer:
      Sponsor:  Sponsor31-can  |
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 This is a follow-up to a bunch of sponsor 31 tooling changes.

 While it's nice to have docs at the start of the script, it's even nicer
 to have a usage option "-h" and usage advice on errors.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31677>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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