bug#32395: 26.1; generated autoloads includes string properties if buffer is open

[Eli Zaretskii]

> From: Allen Li <darkfeline@felesatra.moe>
> Date: Wed, 8 Aug 2018 00:09:22 -0700
> 
> The autoload generation code inserts a form with a string that may or
> may not have text properties, depending on if the buffer is already
> open.
> 
> (if (fboundp 'register-definition-prefixes)
>              (register-definition-prefixes "foo"
>                                            '(#("foo-" 0 4 (fontified nil)))))
> 
> (if (fboundp 'register-definition-prefixes)
>              (register-definition-prefixes "foo" '("foo-")))
> 
> This makes autoload generation depend on the odd condition of whether
> the file under consideration is already open and fontified.

Can you tell more about the use case where you see this?  Does this
happen when the autoload files in the Emacs tree are generated?