Section 3.1.2 of the document correction needed : there should be a || b(0,26) instead of || b(0,27) to add up to 32 bytes.

[ctoma73]

In Section 3.1.2 of the document it is stated, quote: The array has length 32 and contains the UTF-8 encoding of the string “v2.0.0” followed by 0x00- bytes, i.e. ver = 0x76322E302E30 ∥ b(0, 27).
I believe there should be a || b(0,26) instead of || b(0,27) to add up to 32 bytes.
I’ve attached the VSCode notebook file (it opens in VSCode and can be viewed), to execute and run all cells requires Python extension installed in VSCode. My Notebook was able to compute the HP correctly.
HP = 0x2B3B025E50E09C119CBA7E9448ACD1CABC9447EF39BF06327D81C665CDD86296.
hp_test.zip

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[cryptosidh]

Thank you! Yes, this is a typo and it should be b(0,26). This will be corrected in the next iteration of the specification.