bug#52980: elide-head and revert-buffer interaction stops elide-head-show from working

[Stefan Kangas]

<jakanakaevangeli@chiru.no> writes:

>> +  (if elide-head-mode
>> +      (progn
>> +        (elide-head--hide)
>> +        (add-hook 'before-revert-hook 'elide-head--delete-overlay nil 
>> 'local))
>> +    (elide-head--show)
>> +    (remove-hook 'before-revert-hook 'elide-head--delete-overlay 'local)))
>
> Perhaps change-major-mode-hook would be more appropriate as suggested by
> "(elisp) Creating Buffer-Local". That would make the minor mode clean up
> its overlay if the user executes M-x normal-mode in addition to M-x
> revert-buffer.

I think you're right, thanks!  Updated patch attached.

0001-New-minor-mode-elide-head-mode.patch
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