anchor.diff:  
       If the installation was successful, then you will see output like this: <pre><%=h `ruby bin/gerbil -v` %></pre>
   
  -    Otherwise, you can ask for help in the <%= mailing_list_link %>.
  +    Otherwise, you can <%= xref "License", "contact the author" %> for help.
     <% end %>
   
     <% section "Manifest" do %>
  
positive.code: <%
    # local variables for this document
    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'
    source_repo_url   = 'http://gerbil.rubyforge.org/src'
    feed_url          = File.join(Gerbil[:website], 'news.xml')
    feed_icon_url     = File.join(Gerbil[:website], 'feed-icon-28x28.png')
  
    # parameters for the HTML format
    $title   = "#{Gerbil} user guide"
    $authors = { 'Suraj N. Kurapati' => 'http://snk.tuxfamily.org' }
    $feeds   = { feed_url => :rss }
    $logo    = '<img src="gerbil.png" alt="Gerbil logo" title="Gerbil logo"/>'
  %>
  
  <% chapter "Introduction" do %>
    Gerbil is an *extensible document generator* based on "eRuby":http://www.ruby-doc.org/docs/ProgrammingRuby/html/web.html#S2 that outputs to any format you want: <%= xref 'html', "HTML (web page)" %>, <%= xref 'latex', "LaTeX" %>, <%= xref "man", "UNIX man page" %>, <%= xref 'text', 'plain text' %>, <%= xref "HelloWorld", "your own custom format" %>, and so on.
  
    Gerbil is *lighter* and more *flexible* than "DocBook":http://www.docbook.org, "Deplate":http://deplate.sourceforge.net, and "SiSU":http://www.jus.uio.no/sisu/SiSU/ because it is small, fast, and lets you <%= xref "HelloWorld", "define your own custom format" %>. Furthermore, Gerbil is *scriptable* unlike raw text generators such as "AsciiDoc":http://www.methods.co.nz/asciidoc/, "txt2tags":http://txt2tags.sourceforge.net, and "Grutatxt":http://www.triptico.com/software/grutatxt.html because it lets you inject Ruby code directly into your documents for dynamic content generation.
  
    Gerbil is *open-source software* (see <%= xref "License" %>) so feel free to contribute your improvements and discuss your ideas in the <%= mailing_list_link %>. You can obtain the source code from the project "Darcs":http://darcs.net repository by running the following command:
  
      darcs get <%= source_repo_url %> gerbil
  
    <% note "See the source of this guide" do %>
      Did you know that this user guide was generated by Gerbil? Here is "the source document":guide.erb to prove it!
  
negative.code:       gerbil -v
  
      Otherwise, follow these instructions:
      # Download the newest release package from "the download area":<%= pkg_url %>.
      # Extract the release package anywhere you want on your system.
      # Go inside the extracted directory and run the following command:
  
  