ruby/www.ruby-lang.org — pull request #488 by makimoto (2013-12-21 04:15:00+00:00)
Title: Translate 2013-12-21-semantic-versioning-after-2-1-0 into ja

Translate [Semantic Versioning after 2.1.0](https://www.ruby-lang.org/en/news/2013/12/21/semantic-versioning-after-2-1-0/) into Japanese.