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Subject: Re: Lexical Binding on first line for Emacs 29.0.50
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 (message from uzibalqa on Sun, 09 Oct 2022 20:17:15 +0000)
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> Date: Sun, 09 Oct 2022 20:17:15 +0000
> From: uzibalqa <uzibalqa@proton.me>
> 
> 
> Am using Emacs 29.0.50.  Previously it was suggested we use  
> 
> ; file.el -*- lexical-binding: t; -*-
> 
> Is this still valid to add "lexical-binding"?

Yes.  You will see that Emacs itself uses it in its source files.