anchor.diff:                                  // and reset the length to zero to begin a new substring.
                                   offset <- i + 1
                                   length <- 0
  +
  +                                // Increment the substring index.
  +                                substringIndex <- substringIndex + 1
   
                               else
                                   // "Add" this character to the current substring by
  
positive.code:                                 // and reset the length to zero to begin a new substring.
                                  offset <- i + 1
                                  length <- 0
  
                              else
                                  // "Add" this character to the current substring by
  
negative.code:                                 offset <- i + 1
                                  length <- 0
  
                                  // Increment the substring index.
                                  substringIndex <- substringIndex + 1
  
                              else
                                  // "Add" this character to the current substring by
                                  // incrementing the substring length.
  