> Additionally, the "more specific tests" introduce some additional opacity
> that is harmful for knowing what methods and operators are specifically
> used internally in test method.  For end users of Python, they don't have
> to worry much about this, but we as developers of core types really care
> whether self.assertLessThan(x, y) really does x < y, or x.__lt__(y), or
> "not y >= x", etc.

If the test explicitly designed to test relation or boolean operations, I 
leave it as is. I try to be very careful.

After more careful reviewing this patch, I have found than some tests 
shouldn't be changed, because they produce utterly large error message in case 
of a failure (even if resulted message is truncated, as in case of 
assertEqual, large intermediate strings are created). Here is corrected patch.