Deal with odd conditionals.
Address TrivialPredicates cop.
Move over string literals config.
Cleanup extra spaces.
Address RaiseArgs cop.
Keep using Proc.new.
Allow exception rescues.
Allow `raise` over `fail`.
Avoid single-line method defs.
Stop using regex back refs.
Remove redundant returns.
Allow is_ and has_ prefixes for predicates — we already have some.
We don’t care about arg names for binary operator methods.
We can’t use the new lambda syntax.
Using `\` for multiline concat performs better.
Remove unneeded parens.
Use %w[ ] for arrays.

`[]` is the standard delimiter for arrays so using it
for percent literals makes sense.
We like using percent for string formatting.