anchor.diff:      |_. Parameter |_. Type |_. Description |
       | desc        | String | A short description of the output format. |
       | code        | String | Ruby code that will be loaded before the input document is processed. This source code will be evaluated inside the main Gerbil executable, so any file-system or path-dependent portions of this source code should take appropriate precautions. |
  -    | nodes       | Hash   | A listing of node definitions. See <%= xref "SpecFile.nodes" %>. |
  +    | nodes       | Hash   | A listing of <%= xref "SpecFile.nodes", "node definitions" %>. |
       | output      | String | An eRuby template for the final output document. See <%= xref "SpecFile.output" %>. |
   
       <%
  
positive.code:   mailing_list_url  = 'http://rubyforge.org/mailman/listinfo/gerbil-talk'
    mailing_list_link = link(mailing_list_url, "project mailing list")
    download_url      = 'http://rubyforge.org/frs/?group_id=4905'
    feed_url          = File.join(Gerbil[:website], 'rss.xml')
    feed_icon_url     = File.join(Gerbil[:website], 'feed-icon-28x28.png')
  
    # parameters for the HTML format
    $title   = "Gerbil #{Gerbil[:version]} user guide"
    $authors = {'Suraj N. Kurapati' => 'http://rassmalog.rubyforge.org/blog/'}
    $logo    = '<img src="gerbil.png" alt="Gerbil logo" title="Gerbil logo"/>'
    $feeds   = { feed_url => :rss }
  
    # parameters for Gerbil
    $unindent = '  '
  
negative.code:   <% section "Installation" do %>
      If your system has "RubyGems":http://rubygems.org/, then you can install Gerbil by running the following commands:
  
        gem install gerbil
        gerbil -v
  
      Otherwise, follow these instructions:
  