[LyX/master] Add conversion routine for format 612.

[Richard Kimberly Heck]

On 12/7/22 11:32, Jean-Marc Lasgouttes wrote:
> Le 07/12/2022 à 17:19, Richard Kimberly Heck a écrit :
>>> I see a lot of
>>>   lyx2lyx warning: noprefix "false"
>>> in the console when loading files. Is this a forgotten debug message ?
>>
>> I was assuming that should be there, but perhaps it's not a problem 
>> if it isn't?
>>
>> Maybe we don't even need this conversion. The files load fine without 
>> it, though it caused problems with the lyx2lyx tests, apparently, not 
>> to have it. (The new param *is* added on save.)
>
> My problem is not with the conversion, but with the warning. It does 
> not seem to do anything useful.

I'll remove it later.

Riki