I would retain one or two line changes with a comment if it was a fix for a hard to reproduce / corner scenario. Typically with embedded programming it helps- a

I would retain one or two line changes with a comment if it was a fix for a hard to reproduce / corner scenario. Typically with embedded programming it helps- as some fixes are chipset or hardware version specific Otherwise, just clear off wrong code without much comment. I've seen cases where comments too get bloated up over the years and no body owns to clear it up