AC

• De-duplicate double test cases
• Name test cases after the class of coverage intended to be covered
  • ex. instead of "3" returns 3, "integer-like number", "fractional number" etc.
• Break out "interesting" test cases from the test table to their own it blocks
  • stringified -0.0 which is our custom output format
  • An integer-like double that is beyond the precision of an 8 byte double, but is preserved by toFixed
  • A number written in scientific notation (Fractional and int). This is not a test that adds coverage to the case in the table but adds coverage for a viable use case