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> What platform do you get the AttributeError with? Perhaps the function is not well covered in the test suite.
I guess `os.get_terminal_size()` didn't exist on ancient OSes like DOS, OS/2, ancient UNIXes. On all supported platforms (including such exotic as old AIX, QNX or Minix) it should be defined.
Tests should fail if `os.get_terminal_size()` doesn't exist.
> I think Rietveld doesn't like me because I made it a .diff file, and not a .patch file, but who knows.
I think this is because the patch doesn't contain a revision number.
On Windows `os.get_terminal_size()` can raise ValueError if `sys.__stdout__.fileno()` is not one of 0, 1 or 2. It is worth to catch it too. An AttributeError is also raised if sys.__stdout__ has no the "fileno" attribute (StringIO or None).