Fix minor typos in text and code examples

[yjshi2015]

• An example of a little-endian sequence is 0x2a00000000000000, not 0x000000000000002a
• Fix typos
• Improve code and description

[damirka]

Hey @yjshi2015! Thank you for the PR. Suggestions look good with a few notes.

Could you please revert the changes to the sample code and update the PR to fix the merge conflict? Samples are intentionally not padded, and the test function should also not be included in the final output (marked by ANCHOR -> ANCHOR_END pair)

[yjshi2015]

Hey @yjshi2015! Thank you for the PR. Suggestions look good with a few notes.

Could you please revert the changes to the sample code and update the PR to fix the merge conflict? Samples are intentionally not padded, and the test function should also not be included in the final output (marked by ANCHOR -> ANCHOR_END pair)

ok, I had done, plz check, Thx~

[damirka]

Looks good to me! Thank you a lot!