fix 2 documentation errors

Author: kosloot

src/folia_subclasses.cxx

@@ -758,6 +758,7 @@ namespace folia {
     /*!
       \param cls the textclass the text should be in
       \param flags the TEXT_FLAGS for the TextPolicy to use
+      \param debug set debugging to 'debug'
       \return the UnicodeString with the phon content
     */
     TextPolicy tp( cls, flags );

src/folia_utils.cxx

@@ -420,7 +420,7 @@ namespace folia {
 		      bool att_dbg ){
     /// add all attributes from 'atts' as attribute nodes to 'node`
     /*!
-      \param _node The xmlNode to add to
+      \param node The xmlNode to add to
       \param atts The list of attribute/value pairs
       \param att_dbg do we want to debug? (default false)
       some special care is taken for attributes 'xml:id', 'id' and 'lang'