bug#44854: [PATCH] Add lexical-binding cookie to autoload files

[Stefan Monnier]

>> > What's the rationale?  Why not leave it without the cookie, right
>> > until the time we turn lexical-binding on by default?
>> Because when we change the default (not sure what that could be, 2030
>> maybe?), it will change the way existing files are treated except those
>> that have a `lexical-binding:` cookie.  Clearly, this is dangerous
> Dangerous for loaddefs.el? why?

I was not discussing specifically `loaddefs.el`.
The reason to change it in `loaddefs.el` now rather than later is
because I can't see any benefit to doing it later.


        Stefan