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From: Michael Heerdegen <michael_heerdegen@web.de>
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Subject: Re: [SOLVED] Re: (rx regexp to remove space and new lines
Date: Tue, 13 Sep 2022 14:32:58 +0200
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<tomas@tuxteam.de> writes:

> > Eh - oh, of course, depends on the syntax table, sorry.
>
> This would be unfortunate. What would correspond to "[[:space:]]", i.e.
> the syntax-independent POSIX whitespace?

rx transforms 'whitespace' to [:space:].

But (info "(elisp) Char Classes") told me that "[:space:] [...] matches
any character that has whitespace syntax (*note Syntax Class Table)", so I
assumed that the meaning is not constant... or is it?

Michael.