why haven't you, or someone else, edited the answer to indicate this or add a disclaimer?
For a long time I thought that the comment that I left in 2011 after the PHP bug was sufficient. Remembering it today I edited the answer at the same time that I posted here.
Now I could be faulted for not having responded to the comments in 2015. However I was taking an extended break from stack overflow after getting annoyed at the moderation of https://stackoverflow.com/questions/11314077/algorithm-for-e.... When I came back, dealing with the variety of things that could have further annoyed me while I was gone did not seem worthwhile, so I didn't. (It remains a pet peeve that a lot of moderators remain quick to close algorithm questions because they do not recognize DP-type problems as things which are more likely to be answerable by people with a CS background than a math one.)
It is amazing the number of replies in this entire HN thread that have no idea every single question and answer on Stack Overflow is editable, even by an anonymous user. The first item in my list was Stack = wiki for a reason!