:   '''[zlib] adler32''' ''data'' ?''initValue''?
Calculate the checksum of the bytearray ''data'' using the Adler-32 algorithm. The optional ''initValue'' is the seed value for the algorithm; if omitted, a standard default will be used.

** See also **

   * https://guru.multimedia.cx/crc32-vs-adler32/%|%CRC32 vs. Adler32%|%

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