rails--rails/guides/CHANGELOG.md

• Fixed missing line and shadow on service pages(404, 422, 500).

  Dmitry Korotkov

• Removed repetitive th tags. Instead of them added one th tag with a colspan attribute.

  Sıtkı Bağdat

• Added the Rails maintenance policy to the guides.

  Matias Korhonen

Please check 4-0-stable for previous changes.