[tor-bugs] #31914 [Applications/Tor Browser]: Fix eslint linter error

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#31914: Fix eslint linter error
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     Reporter:  acat                      |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
                                          |  TorBrowserTeam201910R
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Right now command `./mach lint -l eslint --fix` is broken. This is useful
 to fix/display JS style issues in a similar way as `clang-format` does for
 C++. The reason seems to be some missing paths for torbutton files that
 are loaded in `browser.xul`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31914>
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