Used IntelliJ IDEA's linter to perform code cleanup.
There were unused variables, `var` that could be replaced with `val`,
and other minor code style issues.
While doing this, I also discovered that a lot of documentation
links were broken. The fix is to stop intenting the text after
a `@param`.
I found that there were a bunch of lingering 'jvm'
tags in the generated markdown documentation.
Got rid of them with another change to format_kotlin_doc.py.
The dokkaGfm tool has a few oddities I don't like.
I updated my format_kotlin_doc.py script to work around
a couple of them:
1. Strip out all the noisy [jvm] tags it puts everywhere.
2. Remove the unhelpful and incorrect `Properties` sections
it adds to all my enum classes and enum members.
I will come back and address other issues later.
