bug#50552: 28.0.50; Add context-menu-occur

[Juri Linkov]

> Why not use the new custom-add-choice function (or something along these
> lines) in dictionary.el?

I tried this:

  (custom-add-choice 'context-menu-functions
                     '(function-item :tag "Dictionary menu" 
context-menu-dictionary))

But it fails with the error:

  (error "Not a choice type: (repeat (choice (function-item ...")

>> 2. To allow using 'add-hook' in the user's init file with e.g.
>>
>>   (add-hook 'context-menu-functions 'context-menu-dictionary 1)
>
> In my case I am setting context-menu-functions manually, without
> add-hook. I am not sure if that breaks anything?

This is a valid way to configure it, it should not break.