Warnings when using Listings in a RTL document

[Jürgen Spitzmüller]

Am Sonntag, dem 02.04.2023 um 13:21 +0200 schrieb Jürgen Spitzmüller:
> This needs some effort. For the time being, I think we will be better
> off with this rather harmless info message.

Possible approach attached.

-- 
Jürgen
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