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Re: Trimming strings, /emacs/lisp/emacs-lisp/subr-x.el modification

From: Jean-Christophe Helary
Subject: Re: Trimming strings, /emacs/lisp/emacs-lisp/subr-x.el modification
Date: Wed, 10 May 2017 20:07:15 +0900

> On May 10, 2017, at 16:45, Andreas Schwab <address@hidden> wrote:
>> Can you give an example of a regexp whose semantics might change by
>> adding \\(..\\)?
> If you have any backrefs, their numbers change.

I think Eli meant using \(?:


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