anchor.diff:                              stream.Stream
                               stream2.Stream
                       struct (Pluggable { Stream = stream }, world)
  -                | _ -> struct (Violation (["InvalidArgumentType"; fnName], "Function '" + fnName + "' requires a Stream for its 2nd and 3rd arguments.", originOpt), world)
  -            | _ -> struct (Violation (["InvalidArgumentType"; fnName], "Function '" + fnName + "' requires a Stream for its 2nd and 3rd arguments.", originOpt), world)
  +                | _ -> struct (Violation (["InvalidArgumentType"; String.capitalize fnName], "Function '" + fnName + "' requires a Stream for its 2nd and 3rd arguments.", originOpt), world)
  +            | _ -> struct (Violation (["InvalidArgumentType"; String.capitalize fnName], "Function '" + fnName + "' requires a Stream for its 2nd and 3rd arguments.", originOpt), world)
   
           static member internal evalProductStream fnName stream stream2 originOpt world =
               match (stream, stream2) with
  
positive.code:                             stream.Stream
                              stream2.Stream
                      struct (Pluggable { Stream = stream }, world)
                  | _ -> struct (Violation (["InvalidArgumentType"; fnName], "Function '" + fnName + "' requires a Stream for its 1st and 2nd arguments.", originOpt), world)
              | _ -> struct (Violation (["InvalidArgumentType"; fnName], "Function '" + fnName + "' requires a Stream for its 1st and 2nd arguments.", originOpt), world)
  
          static member internal evalSumStream fnName stream stream2 originOpt world =
              match (stream, stream2) with
  
negative.code:                                 | None -> (None, world))
                              stream.Stream
                      struct (Pluggable { Stream = stream }, world)
                  | _ -> struct (Violation (["InvalidArgumentType"; String.capitalize fnName], "Function '" + fnName + "' requires a Stream for its 2nd argument.", originOpt), world)
              | _ -> struct (Violation (["InvalidArgumentType"; String.capitalize fnName], "Function '" + fnName + "' requires a Stream for its 2nd argument.", originOpt), world)
  
          static member internal evalFoldStream fnName fn state stream originOpt world =
              match stream with
  