The code was refactored to use more descriptive variable names.
The logic for handling each type of item was consolidated into separate
blocks of code.
The code was made more efficient by reducing the number of times the
Math.min() method was called.
The code was made more readable by adding comments to explain the logic.
This unit test tests the following behaviors of the GildedRose class:
The quality of an Aged Brie item increases over time.
The quality of a Backstage passes to a TAFKAL80ETC concert item
increases over time, then zeroes out.
The quality of a normal item decreases over time.
