[xmlunit/xmlunit.net] c80acb: missing license header

[Stefan B. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: c80acb08cf9769482bdf468265fa721d593b5e6d
      https://github.com/xmlunit/xmlunit.net/commit/c80acb08cf9769482bdf468265fa721d593b5e6d
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2020-05-06 (Wed, 06 May 2020)

  Changed paths:
    M src/tests/net-placeholders/IsDatePlaceholderHandlerTests.cs

  Log Message:
  -----------
  missing license header