Fizzbuzz pairing

This is a pairing task I completed with my pair, Erin.

What we did over both branches

We completed the fizzbuzz kata on the master branch using TDD and Rspec to run tests. 
The main branch used the format seen below: 

fizzbuzz(3)
  
On completion, we decided to re-do the task using an alternative method of fizzbuz: 
  
3.fizzbuzz

This meant we had to change our fizzbuzz code and tests.