New comment on block [block-idp7782352]

[gregtatcam]

or-pattern was first used/explained in Variables and Functions:Recursive functions.

[bactrian]

This comment references this from milestone beta1: https://realworldocaml.org/beta1/en/html/lists-and-patterns.html#idp7782352

Context:

One feature of OCaml's pattern language that we've encountered here for the first time is or-patterns, which allow you to have multiple sub-patterns within a larger pattern. In this case, None | Some ("",_) is an or-pattern. As we'll see later, or-patterns can be nested anywhere within larger patterns.

[yminsky]

Removed the claim of novelty.