anchor.diff:  /// Includes all files
   let allFiles (path:string) = true
   
  -/// <summary>Copies a directory recursivly.
  -/// If the target directory does not exist, it will be created.</summary>
  -/// <param name="target">The target directory.</param>
  -/// <param name="files">The source directory.</param>
  -/// <param name="filterFile">A file filter function.</param>
  +/// Copies a directory recursivly. If the target directory does not exist, it will be created.
  +/// ## Parameters
  +/// 
  +///  - `target` - The target directory.
  +///  - `files` - The source directory.
  +///  - `filterFile` - A file filter predicate.
   let CopyDir target source filterFile =
       CreateDir target
       Directory.GetFiles(source, "*.*", SearchOption.AllDirectories)
  
positive.code: ﻿[<AutoOpen>]
  module Fake.FileHelper
  
  open System.IO
  
negative.code:     else
         logfn "%s does already exist." dir.FullName
      
  /// Creates a file if it does not exist.
  let CreateFile fileName =   
      let file = fileInfo fileName
      if not file.Exists then 
  