bugfix in the Documentation module for German. Before Adverbs were documented as Prepositions.

src/german/DocumentationGerFunctor.gf

@@ -64,7 +64,7 @@ lin
 
   InflectionAdv adv = {
     t  = "adverb" ;
-    s1 = heading1 (heading preposition_Category) ;
+    s1 = heading1 (heading adverb_Category) ;
     s2 = paragraph adv.s
     } ;
 

src/german/TerminologyGer.gf

@@ -23,6 +23,7 @@ lin
   noun_Category = mkN "Substantiv" ;
   adjective_Category = mkN "Adjektiv" ;
   verb_Category = mkN "Verb" ;
+  adverb_Category = mkN "Adverb" ;
   preposition_Category = mkN "Präposition" ;
 
   gender_ParameterType = mkN "Geschlecht" ;