[issue21510] fma documentation should provide better example.

[Antoine Pitrou]

Antoine Pitrou added the comment:

Just for the record, I think that an example also helps educate a non-expert reader (such as me ;-)) about the rounding problem.

----------
nosy: +pitrou

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21510>
_______________________________________