See https://en.wikibooks.org/w/index.php?title=Wikibooks:Reading_room/Technical_Assistance&oldid=3603127, in the section titled "Bug in source code highlighting".
Basically, an inline comment causes an instruction on the very next line to get incorrectly highlighted. Furthermore, in hexadecimal literals that start with decimal digits, such as 024AF1B, the "024" is grey while the "AF1B" is not.