bug#24749: Making sure syntax-propertize is called

[Stefan Monnier]

>> Nowadays, syntax-propertize is automatically called ondemand by the sexp
>> functions, but only if parse-sexp-lookup-properties is non-nil.
>> See bug#4920 for an example of the problem and the fix we installed.
>> I suggest we install the patch below instead, so as to fix this bug in
>> more/all major modes at once.
> Since when does this issue exist?

25.1.

> The issue seems of rather low importance to me, so unless it's a
> regression since Emacs 24.5, I think the fix should go to master, not
> to the release branch.

100% agreement (I just happened to send the bug-report from an Emacs
built from the master branch before it got renumbered).


        Stefan