[ruby-cvs:78432] a2fc6a51dd (master): [ruby/fileutils] Fix test failure under ruby 2.4

Unknown <[email protected]> Sun, 1 Dec 2019 08:30:12 +0900 (JST)

Newsgroups	gmane.comp.lang.ruby.cvs
Message-ID	<[email protected]>

David Rodríguez	2019-11-30 22:03:12 +0900 (Sat, 30 Nov 2019)

  New Revision: a2fc6a51dd

  https://github.com/ruby/ruby/commit/a2fc6a51dd

  Log:
    [ruby/fileutils] Fix test failure under ruby 2.4
    
    `Exception#full_message` is only defined on ruby 2.5.0 and above.
    
    https://github.com/ruby/fileutils/commit/a8968f41ed

  Modified files:
    tool/lib/test/unit/core_assertions.rb