anchor.diff:  "Clean"
     ==> "Source.dll"
     ==> "Tests.dll"
  +  ==> "xUnitTest"
     ==> "Default"
   
   // start build
  
positive.code:                         "build/Source.dll" ] }) 
  )
  
  Target "Default" (fun _ ->
      trace "All set."
  )
  
negative.code: 
  open Fake
  open Fake.FscHelper
  open Fake.Testing
  
  // http://fsharp.github.io/FAKE/fsc.html
  
  