fix wording in https://trac.osgeo.org/grass/changeset/63751

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@63752 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/init/variables.html

@@ -340,8 +340,7 @@ PERMANENT
   values: <em><a href="cairodriver.html">cairo</a></em>, <em><a href="pngdriver.html">png</a></em>, <em><a href="psdriver.html">ps</a></em>,
     <em><a href="htmldriver.html">html</a></em>
     or <em>default</em><br>Default display driver
-    is <em><a href="cairodriver.html">cairo</a></em> when GRASS is
-    compiled with Cairo support
+    is <em><a href="cairodriver.html">cairo</a></em> (if available)
     otherwise <em><a href="pngdriver.html">png</a></em>.
   </dd>