[voidpointer]

Well put.

There are far more relevant points, such as the fact that the fudged data series isn't even used anywhere in the rest of the program. The code fragment is indeed pretty useless without the entire program. It seems like ESR has stopped looking at the code once he thought he had found what he was looking for. The adjusted data is never referenced in the rest of the program: http://news.ycombinator.com/item?id=964896

Ideally we would have access to the entire program + data and could re-run it to see whether the graph was produced with or without the adjustments enabled. It is very well possible that the program was altered after the graph was plotted and before that version of the source became public.