German: Combine with other editions of Goethe's Divan, improve title

[Martin]

Hi,

this edition, the most worthy to be cited, should be joined with the general page for this work by Goethe: https://www.goodreads.com/book/show/3...

Furthermore the ISBN refers to both volumes so the additional title "Texte und Kommentar 1" should perhaps be removed, because it only applies to volume 1. Volume 2 has the additional title "Kommentar 2", in case both volumes are to get their mention.

Thanks

Martin Riexinger