According to http://pt.wikisource.org/w/index.php?oldid=92119&uselang=en#Novos_ajustes_t.C3.A9cnicos , with no one has opposed [neither endorsed :(], please:
- Enable subpages for the main namespace at Portuguese Wikisource ($wgNamespacesWithSubpages) ;
- Add the custom namespace "Autor:" (102) into $wgNamespacesToBeSearchedDefault .
Best regards,
[[:m:User:555]]
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