
[;1m  adler32(OldAdler, Data)[0m

  Continues computing the adler32 checksum by combining the previous
  checksum, [;;4mOldAdler[0m, with the checksum of [;;4mData[0m.

  The following code:

    X = erlang:adler32(Data1),
    Y = erlang:adler32(X,Data2).

  assigns the same value to [;;4mY[0m as this:

    Y = erlang:adler32([Data1,Data2]).
