As reported in the title: >>> float.as_integer_ratio.__doc__.splitlines()[2] 'Returns a pair of integers, whose ratio is exactly equal to the original' >>> float.as_integer_ratio.__doc__.splitlines()[4] 'Raises OverflowError on infinities and a ValueError on NaNs.' >>> float.conjugate.__doc__ 'Returns self, the complex conjugate of any float.' >>> float.is_integer.__doc__ 'Returns True if the float is an integer.' >>> float.__setformat__.__doc__.splitlines()[-2] 'Overrides the automatic determination of C-level floating point type.' ... They should have been 'Return...', 'Raise...' and 'Override...' Patch is attached