Elisp Conventions

Some of this aligns with existing style guides. Some of it does not.

In general, prefer functions with fixed arities instead of variadic alternatives.

• Namespace functions with namespace/function-name
• Use ensure, assert, refute whenever possible.
• When talking about encoding and decoding, let's use the words "encoding" and "decoding" rather than the myriad of other variants that appear like:
  • marshalling and unmarshalling
  • parse and deparse, serialize, stringify
  • unpickle and pickle (Python)
  • from-string and to-string

  • TODO: Add more examples of these; there should be close to a dozen.

• Annotate assertions with ! endings.
• Prefer the Scheme style of predicate?
• Variadic functions should encode this by appending * onto their name. E.g. maybe/nil?*