Fixed typos in Kernel

Also reworded some docstrings to make more sense
Merge pull request #1359 from justinj/kernel_typos

Fixed typos in Kernel
Fixed typos in Kernel

This line of code is referenced from the blog post by the following link: https://peepcode.com/blog/2013/elixir-is-for-programmers
Merge pull request #1360 from AlbertMoscow/master

Fixed typos in Kernel