Acronyms are not defined before use

[MichaelRWolf]

Replacing first references to acronyms would aid readability, especially for folks new to BDD (as many shell programmers will be).

The ones that caught my eye were:

• ... BDD (Behavior Driven Design) ...
• ... DSL (Domain-specific language) ...
• ... CLI (Command Line Interface) ...

P.S. The one that originally tripped me was DSL because I was looking for a formal definition of a DSL language (so that I could use an appropriate editing mode in emacs(1), because shell-script-mode didn't like to preserve indention nicely.

P.P.S. Bonus points for speaking to this in the DSL definition section. Yes, it is valid script, but practically, it doesn't display nicely in modern browsers (as far as I can tell). Any tips/tricks would be welcome.