String representation of Fraction

[jbrucker]

Your test cases look good.

About the string representation for n/0,
since we allow user to create fractions with denominator
zero, the str method should display it
(not an error message).

This allows arithmetic with "extended numbers", Infinity
and NaN (Not-a-Number). You don't need to worry about
operations with extended numbers, but please make
str return fractions with denominator=0
as ordinary fractions, e.g. "1/0", "-1/0", or "0/0",
not an error message.

[th-bunratta]

Those issues are resolved. I did know this issue, but I forgot to publish that. I'm still looking for more test cases to be discovered.

Anyway, thanks for pointing me out 🍡