anchor.diff:  #endif
     val switch: Stream<'x> -> Stream<'x> -> Stream<'x>
   
  -  /// `switchTo xs ys` is equivalent to `switch ys xs`.
  +  /// `switchTo lhs rhs` is equivalent to `switch rhs lhs`.
   #if DOC
     ///
     /// `switchTo` is designed to be used in pipelines:
     ///
  -  ///> xs
  -  ///> |> switchTo ys
  +  ///> firstStream
  +  ///> |> switchTo otherStream
   #endif
     val switchTo: Stream<'x> -> Stream<'x> -> Stream<'x>
   
  
positive.code:   ///
    ///> live |> samplesAfter ticks
    ///
    /// `pullOn ts xs` is equivalent to `zipWithFun (fun _ x -> x) ts xs`.
  #endif
    val pullOn: ticks: Stream<_> -> Stream<'x> -> Stream<'x>
  
negative.code:     val tap: Src<'x> -> Stream<'x>
  
    /// Represents a mutable variable, called a stream variable, that generates a
    /// stream of values as a side-effect.  See also: `MVar<'x>`.
  #if DOC
    ///
    /// The difference between a stream variable and a stream source is that a
  