Various improvements to the bash style guide from a concerned citizen.

One of the members of the community provided some feedback on various
problems they had run into over the years. Many of which were good,
some of which were awesome. I've incorporated them and then plan to
verbally berate them for not making their own pull request (:
You should only feel shame/2, whoever reviewed it should feel equally ashamed. Oh damn that was probably me. #sharedshame