Thank you for the link. This line

['u', 'Z*',  "foo\0bar \0", "foo"]
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defines the test for an unpack using the 'Z*' template and it would appear that a successful test would not leave a trailing null in the resultant string. I think this confirms that the expected behaviour is that the first null and everything to its right will be stripped. I think the use of "after" in Z strips everything after the first null is misleading and the wording should be clarified. Perhaps Z strips everything from the first null onwards would be a more accurate description.