Merge psych-3.0.0.beta3 from ruby/psych.

  * Rely on encoding tags to determine if string should be dumped as binary.
    https://github.com/ruby/psych/commit/8949a47b8cee31e03e21608406ba116adcf74054
  * Specify "frozen_string_literal: true".
  * Support to binary release for mingw32 platform.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59327 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 1 deletions

diff --git a/test/psych/test_scalar.rb b/test/psych/test_scalar.rb
index 4353ec33fa..e2f9ec791d 100644
--- a/test/psych/test_scalar.rb
+++ b/test/psych/test_scalar.rb
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require_relative 'helper'
 
@@ -8,5 +8,10 @@ module Psych
     def test_utf_8
       assert_equal "日本語", Psych.load("--- 日本語")
     end
+
+    def test_some_bytes # Ticket #278
+      x = "\xEF\xBF\xBD\x1F"
+      assert_cycle x
+    end
   end
 end