anchor.diff:          /// <param name="count">The number of copies of the input string will be copied.</param>
           /// <param name="str">The input string.</param>
           /// <returns>The concatenated string.</returns>
  -        /// <exception cref="System.ArgumentNullException">Thrown when the input string is null.</exception>
  +        /// <exception cref="System.ArgumentException">Thrown when <c>count</c> is negative.</exception>
           [<CompiledName("Replicate")>]
           val replicate: count:int -> str: string -> string
   
           /// <summary>Returns the length of the string.</summary>
           /// <param name="str">The input string.</param>
           /// <returns>The number of characters in the string.</returns>
  -        /// <exception cref="System.ArgumentNullException">Thrown when the input string is null.</exception>
           [<CompiledName("Length")>]
           val length: str:string -> int
   
  
positive.code:         /// <param name="strings">The sequence of strings to be concatenated.</param>
          /// <returns>A new string consisting of the concatenated strings separated by
          /// the separation string.</returns>
          /// <exception cref="System.ArgumentNullException">Thrown when strings is null.</exception>
          [<CompiledName("Concat")>]
          val concat: sep:string -> strings: seq<string> -> string
  
          /// <summary>Applies the function <c>action</c> to each character in the string.</summary>
          /// <param name="action">The function to be applied to each character of the string.</param>
          /// <param name="str">The input string.</param>
          /// <exception cref="System.ArgumentNullException">Thrown when the input string is null.</exception>
          [<CompiledName("Iterate")>]
          val iter: action:(char -> unit) -> str:string -> unit
  
  
negative.code:         /// <param name="mapping">The function to apply to the characters of the string.</param>
          /// <param name="str">The input string.</param>
          /// <returns>The resulting string.</returns>
          [<CompiledName("Map")>]
          val map: mapping:(char -> char) -> str:string -> string
  
  