[xmlunit/xmlunit.net] b9f6fc: port fix for xmlunit/#39

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

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: b9f6fcc40a8baf6517cde21dcf631bedfb62a288
      https://github.com/xmlunit/xmlunit.net/commit/b9f6fcc40a8baf6517cde21dcf631bedfb62a288
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2015-12-01 (Tue, 01 Dec 2015)

  Changed paths:
    M RELEASE_NOTES.md
    M src/main/net-core/Diff/ElementSelectors.cs
    M src/tests/net-core/Diff/ElementSelectorsTest.cs

  Log Message:
  -----------
  port fix for xmlunit/#39