[xmlunit/xmlunit] f19722: typo

[GitHub <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit
  Commit: f19722ebd1671d2929928b9e2124de06cff7e7b2
      https://github.com/xmlunit/xmlunit/commit/f19722ebd1671d2929928b9e2124de06cff7e7b2
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2017-07-10 (Mon, 10 Jul 2017)

  Changed paths:
    M HELP_WANTED.md

  Log Message:
  -----------
  typo