[ruby-cvs:78569] 4b36832ba6 (master): Merge the upstream changes for test-unit on ruby/logger.

Hiroshi SHIBATA	2019-12-09 19:11:18 +0900 (Mon, 09 Dec 2019)

  New Revision: 4b36832ba6

  https://github.com/ruby/ruby/commit/4b36832ba6

  Log:
    Merge the upstream changes for test-unit on ruby/logger.
    
      This commits are based with:
        https://github.com/ruby/logger/commit/f067f7d1aa743b467d633ec6d1790bd93ed9e25b
        https://github.com/ruby/logger/commit/86058f420d8f6909500cccceb24f58bef0597b4d
        https://github.com/ruby/logger/commit/02db6e8ed85d1f4ba974f08fee292bad400d9fc2

  Modified files:
    lib/logger/logger.gemspec
    test/logger/helper.rb