title: With Ruby, does "gem install" use "--include-dependencies"... just the doc is a little outdated?
body: <p>Using Ruby on Rails, if I do a</p>
  
  <pre><code>gem help install
  </code></pre>
  
  <p>a part of it says:</p>
  
  <pre><code>-y, --include-dependencies       Unconditionally install the required
                                   dependent gems
  
  [...]
  
  Defaults:
    --both --version '&gt;= 0' --rdoc --ri --no-force
    --no-test --install-dir c:/ruby/lib/ruby/gems/1.8
  </code></pre>
  
  <p>but if I do a </p>
  
  <pre><code>gem install --include-dependencies mysql
  </code></pre>
  
  <p>a line says:</p>
  
  <pre><code>INFO:  `gem install -y` is now default and will be removed
  INFO:  use --ignore-dependencies to install only the gems you list
  </code></pre>
  
  <p>so looks like <code>gem install</code> always use <code>--include-dependencies</code> now?  Just the docs of <code>gem help install</code> is a little outdated?</p>
  
  <p>I am using the most recent gem:</p>
  
  <pre><code>C:\&gt;gem -v
  1.3.7
  
  C:\&gt;gem update --system
  Updating RubyGems
  Nothing to update
  
  C:\&gt;
  </code></pre>