anchor.diff:  
   open System
   open System.IO
  +open System.Collections.Generic
   
   /// Functions that fetch files that should be included.
   module Include =
  
positive.code: 
  /// Functions that parse specific metadata elements, such as the page title and date.
  module Metadata =
      /// Parse the page title.
      let title() =
          "    <title>" + "TODO" + "</title>"
  
  /// Functions that are used to parse files (e.g. Markdown, templates).
  module Parse =
  
negative.code:     let markdown() =
          for mdFile in Directory.EnumerateFiles(Environment.CurrentDirectory, "*.md", SearchOption.AllDirectories) do
              let htmlFile = Path.ChangeExtension(mdFile, "html")
              let markdown = File.ReadAllText mdFile
  
              let metadata = Metadata.extract(markdown)
  
              let html = Markdown.TransformHtml(markdown)
              let page : string =
                  Include.header()
                  + "<title>" + metadata.Item("title") + "</title>"
                  + Include.body()
                  + Include.navigation()
                  + html
                  + Include.footer()
  
              File.WriteAllText(htmlFile, page)
  
  