title: Installing brew on Mac 10.6 results in syntax error
body: <p>Running the following command from <a href="http://brew.sh/" rel="noreferrer">http://brew.sh/</a>:</p>
  
  <pre><code>/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
  </code></pre>
  
  <p>...result in:</p>
  
  <blockquote>
    <p>-e:192: syntax error, unexpected '.', expecting $end
                   .map { |d| File.join(HOMEBREW_PREFIX, d) }
                    ^</p>
  </blockquote>
  
  <p>I'm using zsh on Mac OS 10.6.</p>