Enables CJK friendly emphasis extension for CommonMark (#43234).

Patch by Katsuya HIDAKA (user:hidakatsuya).


git-svn-id: https://svn.redmine.org/redmine/trunk@24013 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/wiki_formatting/common_mark/formatter_test.rb

@@ -342,6 +342,13 @@ class Redmine::WikiFormatting::CommonMark::FormatterTest < ActionView::TestCase
       assert_not_include 'markdown-alert', html
     end
 
+    def test_should_enable_cjk_friendly_emphasis_extension
+      assert_equal(
+        "<p><strong>この文は重要です。</strong>而且，<strong>这句话也非常重要。</strong>이 문장은 중요하지 않습니다.</p>",
+        to_html("**この文は重要です。**而且，**这句话也非常重要。**이 문장은 중요하지 않습니다.")
+      )
+    end
+
     private
 
     def assert_section_with_hash(expected, text, index)