test.coffee

    for own ind, char of as
      # Iterate over the characters in a-split
      if matching
        # So far we have only found matching chars...
        if bs[ind] == char
          # If they're still matching then great
          continue
        else
          # Uh-oh! We've found the first mistmatch!
          matching = false
          index = parseInt(ind, 10)

      if not matching
        
        # If at this point it is no longer matching
        # build up the diff

        # Let's see if we can find somewhere in the future where 
        # they will start to match up again until the end of the blobs

        resta = as.slice(ind)
        restb = bs.slice(ind)

        if resta and restb

          for i in [0..resta.length]
            att = @diffHelper(resta, restb, i)

            if att
              # We found it!
              rold = rold.concat(resta.slice(0, i))
              return { index: index, old: rold.join(""), new: rnew.join("") }

          for i in [0..restb.length]
            att = @diffHelper(restb, resta, i)
            
            if att
              # We found it!
              rnew = rnew.concat(restb.slice(0, i))
              return { index: index, old: rold.join(""), new: rnew.join("") }