/tutorial/index.po small bug fix

Author: sba72

tutorial/index.po

@@ -92,7 +92,7 @@ msgid ""
 "and :ref:`library-index`.  :ref:`reference-index` gives a more formal "
 "definition of the language.  To write extensions in C or C++, read :ref:"
 "`extending-index` and :ref:`c-api-index`. There are also several books "
-"covering Python in depth."
+"covering Python in depth."s
 msgstr ""
 "Eine Beschreibung der Standardobjekte und -module findest du unter :ref:`builtins-index` "
 "und :ref:`library-index`. :ref:`reference-index` bietet eine formellere Definition "