[tor-bugs] #17450 [Tor]: Clean up the doc/HACKING/* docs a bit

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#17450: Clean up the doc/HACKING/* docs a bit
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     Reporter:  karsten      |      Owner:
         Type:  enhancement  |     Status:  new
     Priority:  Very Low     |  Milestone:
    Component:  Tor          |    Version:
     Severity:  Trivial      |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |    Sponsor:
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 As part of last week's 1-1-1 task exchange I said I'd "review
 doc/HACKING/* in master".  Please find
 [https://gitweb.torproject.org/karsten/tor.git/log/?h=hacking branch
 hacking in my public repository] for some typo fixes and trivial changes.

 And here are a few more comments:

  - `doc/HACKING/GettingStarted.txt` ends with an empty section called
 "Where do I go from here?".  Maybe that section should just go away,
 unless we feel like we should suggest something to the reader.

  - `doc/HACKING/HelpfulTools.txt` contains two typos in "berformance
 pottlenecks" which I didn't fix, because I wasn't sure whether it's a
 Monty Python joke or just two typos.

  - What do you think about turning all these .txt files into .md and
 unifying the markup?  Some people might prefer reading these files using
 their favorite graphical Markdown display tool, rather than their text
 editor.  Maybe this could be an easy follow-up 1-1-1 task.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17450>
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