Error in Wiki:
https://zdoom.org/wiki/A_Jump
"A_Jump (127, 4)" is not 50% change, it's 127/256, that is 49,609375% chance. 128 is 50%. Same in all other examples using 127.
"goto Melee // <- This line is skipped because it does not define a frame" - This description is wrong, because this is only a snippet and Melee can be defined outside of it. Needs to be changed to something like "Go to Melee state (if it is defined) ~98% of the time"
Many monster reference definitions aren't up-to-date, specifically *BOSS flags aren't set in the Wiki.
https://zdoom.org/wiki/DECORATE_expressions
"Warning: Modifying the actor's health is NOT the same as healing and damaging. Modifying this field simply changes its base value." is confusing, should be changed to "Warning: Modifying health field directly simply changes its base value. A_SetHealth modifies current health, but it is NOT the same as healing and damaging."
P.S. I'd like to have a Wiki account to change things directly.