Doc: qdoc does not understand special characters

You have to use \unicode commands, but those won't produce the correct
results within a \code command, so I cannot use them here.

Change-Id: I34ab32dd649bdf4167cfcd295ef1f9546a670ea5
Reviewed-on: http://codereview.qt-project.org/5873


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

doc/api/external-tool-spec.qdoc

@@ -174,7 +174,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <externaltool id="sort">
     <description>Sorts the selected text</description>
-    <description xml:lang="de">Sortiert den ausgewählten Text</description>
+    <description xml:lang="de">Sortiert den ausgewaehlten Text</description>
     <displayname>Sort Selection</displayname>
     <displayname xml:lang="de">Auswahl Sortieren</displayname>
     <category>Text</category>