Replace fixed text umlaut with octal value
Also fix German "Tarot Cards" translation, Tarock cards are the
french cards, that are not used for predicting the future / telling
fortunes
How such string constants are compiled into code depends on the encoding
used for the source file, which easily is changed by accident (e.g.
between UTF-8 and Latin-1 encoding). Better to explicitly encode the
character codes, as is already done for various other text messages.
