anchor.diff:  
   type RSS = XmlProvider<"http://tomasp.net/blog/rss.aspx">
   
  +#if GITHUB
   type GitHub = JsonProvider<"https://api.github.com/repos/fsharp/FSharp.Data/issues">
  +#endif
   
   let getTestData() = async {
       do! Http.AsyncRequest("https://accounts.coursera.org/api/v1/login",
  
positive.code:         with _ -> 
              return [| |]
      }
      let! indicator = WorldBankDataProvider<Asynchronous=true>.GetDataContext().Countries.``United Kingdom``.Indicators.``School enrollment, tertiary (% gross)``
      let result = 
          [ 
            [ for row in Seq.truncate 5 stocks.Rows -> sprintf "HLOC: (%A, %A, %A, %A)" row.High row.Low row.Open row.Close ]
            [ for item in Seq.truncate 5 rss.Channel.Items -> item.Title ]
            [ for issue in Seq.truncate 5 issues -> sprintf "#%d %s" issue.Number issue.Title ]
            [ for year, value in Seq.truncate 5 indicator -> sprintf "%d %f" year value ]
          ]
          |> List.collect id
  
negative.code:         |> Async.Ignore
      let! stocks = Stocks.AsyncGetSample()
      let! rss = RSS.AsyncGetSample()
  #if GITHUB
      let! issues = async {
          try
              // doesn't work on Win8 (#548)
  