Although some of the bugs (e.g. missing "self") in the autodoc doc strings
when using "-builtin" option were fixed in the Doxygen branch, others are
still present, so we still need to skip some of the tests in "-builtin" case.
Show that there is trailing white space in the output in an ugly but
functional way, as without this it's impossible to determine what is the
actual change at all.
This is much more readable than just dumping the expected output and the
actual result produced by SWIG, especially for longer Doxygen comments.
Remove the bunch of commented out code and also do not save the results
in the file, this is not very useful as it's not even clear which test the
files correspond to and annoying when these files are left over later. If
anybody really uses this functionality, it ought to be optional.
