Section on whitespace?

Is it worth adding a section on whitespace?

One example that comes to mind is the infamous U+180E (https://github.com/mathiasbynens/regexpu-core/commit/9b10d2a597d4e56b236cae0f9aa2f21a9c6d1122), which used to be an ECMAScript whitespace character but no longer is one since ES2015.

I’m leaning towards this not being worth it, since the definition of whitespace is relatively stable at this point (both in ECMAScript and in Unicode).

No file or test is named. Review the repository's existing feature sections and the cited Unicode and ECMAScript whitespace definitions before deciding whether this topic belongs; done means documenting the decision or adding a clearly scoped whitespace section.

Written by the indexing model from the issue text.