Error in translation file causes fatal error

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In the German WordPress support forums an user reported an error of type E_ERROR when running the plugin Child Theme Configurator. I could track the error down to an issue with the German translation.

In file lang/child-theme-configurator-de_DE.po line 1497
msgid "%sPreview your child theme%s before activating."
is incorrectly translated as
msgstr "%sPrüfen Sie Ihr Kindthema in der Voransicht% vor der Aktivierung."

The missing letter “s” after the second % results in a formatting error.

https://plugins.trac.wordpress.org/browser/child-theme-configurator/trunk/lang/child-theme-configurator-de_DE.po#L1498

Also a hint for future translations: In German we usually don’t translate the technical term “child theme” but refer to it as “Child-Theme” (instead of “Kindthema”, which sounds unintentionally funny and may cause confusion).