FW: [External] : Supplying DOC string in a `defun' using `defvar'

[Drew Adams]

[Forwarding to the list, which got dropped from
`Reply All' for some reason.]
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Sent: Tuesday, June 1, 2021 9:36 AM To: 'Stefan Monnier'

> You most likely used the old dynamically scoped ELisp dialect.
> In Emacs-28 you should see in the modeline "ELisp/d" where the "/d" is
> highlighted in orange to bring your attention to your use of that old
> dialect and encourage you to change it (e.g. by clicking on it).

Why is `:documentation' supported only for lexical-binding buffers?

Reason in terms of user expectation behavior?
Reason in terms of implementation ease/feasiblity?