rails--rails/railties/guides/source/_welcome.html.erb

<h2>Ruby on Rails Guides</h2>

<% if @edge %>
<p>
  These are <b>Edge Guides</b>, based on the current <a href="https://github.com/rails/rails/tree/<%= @version %>">master</a> branch.
</p>
<p>
  If you are looking for the ones for the stable version, please check
  <a href="http://guides.rubyonrails.org">http://guides.rubyonrails.org</a> instead.
</p>
<% else %>
<p>
  These are the new guides for Rails 3.1 based on <a href="https://github.com/rails/rails/tree/<%= @version %>"><%= @version %></a>.
  These guides are designed to make you immediately productive with Rails, and to help you understand how all of the pieces fit together.
</p>
<% end %>
<p>
  The guides for Rails 2.3.x are available at <a href="http://guides.rubyonrails.org/v2.3.11/">http://guides.rubyonrails.org/v2.3.11/</a>.
</p>