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Please submit patches as unified or context diffs.

The file you have attached fails for me as well, I get

**********************************************************************
File "/tmp/Rational.py", line 115, in Rational
Failed example:
    float(p.trim(1L<<32)-p)
Expected:
    -7.3974359428840768e-020
Got:
    -7.3974359428840768e-20
**********************************************************************
File "/tmp/Rational.py", line 126, in Rational
Failed example:
    float(p.approximate(rational(1L)>>32)-p)
Expected:
    1.3733999215941832e-011
Got:
    1.3733999215941832e-11
**********************************************************************

I have now untabified Rational.py, please use that as a
starting point for further changes.