bug#69511: Restore any state after revert-buffer

[Juri Linkov]

>> Like Michael suggested a set of functions should be created.
>> These functions should share the same prefix.
>> 
>> So the whole set of functions will be:
>> 
>> revert-buffer-state-functions
>> revert-buffer-state-read-only
>> revert-buffer-state-outlines
>> ...
>> 
>> Or like the variable 'preserve-modes' hints above,
>> the common prefix could be like this:
>> 
>> revert-buffer-preserve-functions
>> revert-buffer-preserve-modes
>> revert-buffer-preserve-read-only
>> revert-buffer-preserve-outlines
>> ...
>> 
>> Which prefix would you prefer?
>
> How about revert-buffer-restore- ?

"restore" would be only part of the truth,
because these functions first save the state,
only their second task is to restore the saved state
afterwards.