Sebastien Vauban <sva-news-D0wtAvR13HarG/idocf...@public.gmane.org>
writes:

> Though, when executed interactively on an HTML buffer, it does work as
> expected.
>
> I don't get what's wrong... Maybe one of you can have an idea?

What's wrong is that

(with-output-to-string (shell-command-on-region ...))

will not give you what you want, since the output of
(shell-command-on-region ...) is not sent to standard-output.

-- 
 Bastien


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