Finish printf

Yesterday I fixed all bugs on my printf. It’s now passing on all tests, and I’ll do my first evaluation today.

I learned many of the differences between Linux’s and MacOS’s implementations of printf:

• Linux doesn’t handle precision for "(null)" string.
• Linux prints "(nil)" when the %p conversion receives a NULL pointer.

Today I’ll plan on doing all of my printf’s evaluations and start researching the next project: MiniRT. I’ll also setup the official VM, which is used in this project.