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From: Michael Heerdegen <michael_heerdegen@web.de>
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Subject: Re: How to grep for a string spanning multiple lines?
Date: Sun, 27 Nov 2022 13:04:36 +0100
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Jean Louis <bugs@gnu.support> writes:

> > > (rx (one-or-more (or "\n" (any whitespace)))) ➜ "\\(?:
> > > \\|[[:space:]]\\)+"
> > 
> > `rx' has a keyword to mach any char (including whitespace), it's
> > called `anychar'.
>
> OK sure, thanks. Though I can't see relation from any char to
> searching for whitespaces including new line. How do you mean it?

Sorry, I was a bit confused by the fact that this been discussed not
that long ago, some weeks maybe?  AFAIR I there said one could use

  (rx (any whitespace ?\n))

Michael.