anchor.diff:  open System.IO
   open Expecto
   open Infrastructure
  -
  +open Fake.IO.FileSystemOperators
   module Array =
       let insert v i (l : 'a array) =
           let newArray = Array.zeroCreate (l.Length + 1)
  
positive.code:                 i <- i + 1
              lines |> File.writeNew buildScript
  
      let ``change githubRelease function to only run release checks`` (d : DirectoryInfo) = 
          let buildScript = ``get build.fsx`` d
          let lines = File.ReadAllLines buildScript
          let githubReleaseStartIndexOpt = lines |> Array.tryFindIndex (fun line -> line.Contains "let githubRelease")
  
negative.code:             Some (startIdx, endIdx)
  
      let ``get build.fsx``  (d : DirectoryInfo) =
          d.FullName </> "build" </> "build.fsx"
  
  
      let ``transform build script with`` (replaceFn : string -> string) (d : DirectoryInfo) =
  