anchor.diff:              with
                   | _ -> 
                       thrown <- true
  -            assertFalse thrown
  +            thrown.should equal false
           it "fails when no exception is thrown" <| fun() ->
               let mutable thrown = false
               let f = fun () -> ()
  
positive.code:         it "Is a failure" <| fun () ->
              let r = TestReport()
              r.reportFailure()
              assertFalse(r.success())
  
  describe "Assertion helpers" <| fun() ->
      describe "equals" <| fun() ->
  
negative.code: module Main
  open FSpec
  open Expectations
  
  let assertMatches actual pattern =
      let regex = System.Text.RegularExpressions.Regex pattern
  