[tor-bugs] #13790 [Core Tor/Tor]: Refactor and add comments to new_route_len()

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#13790: Refactor and add comments to new_route_len()
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 Reporter:  dgoulet                              |          Owner:
                                                 |  catalyst
     Type:  enhancement                          |         Status:  closed
 Priority:  Low                                  |      Milestone:  Tor:
                                                 |  0.3.1.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  026-deferrable,                      |  implemented
  tor-03-unspecified-201612                      |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:  dgoulet                              |        Sponsor:
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Comment (by dgoulet):

 This test could benefit from having an expected msg modification (not
 failing just verbose):
 {{{
 circuitbuild/unhandled_exit: Apr 03 12:06:20.192 [warn]
 route_len_for_purpose(): Bug: Unhandled purpose 19 with a chosen exit;
 assuming routelen 4. (on Tor 0.3.1.0-alpha-dev 67c88fd10dd74d03)
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13790#comment:25>
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