Today, I carefully looked through every change in my patching. I asked
myself "Does this do the same things in the same order as the original?"
and "Could exceptions cause the code to function differently?" They only
changes were when the block which used the file was not in a try finally
block so if an exception were raised, it the file would be closed. The
with statement of course removes this problem. So, I do believe the
patch is "semantically neutral." I would, however, not mind if another
set of eyes examined it.