shorter doxygen xml output

doc/Doxyfile.in

@@ -2018,7 +2018,7 @@ XML_OUTPUT             = xml
 # The default value is: YES.
 # This tag requires that the tag GENERATE_XML is set to YES.
 
-XML_PROGRAMLISTING     = YES
+XML_PROGRAMLISTING     = NO
 
 # If the XML_NS_MEMB_FILE_SCOPE tag is set to YES, doxygen will include
 # namespace members in file scope as well, matching the HTML output.

doc/common/config.rst

-Class Config
-============
+Config
+======
 
 .. doxygenclass:: Config
    :members:

doc/common/mesh.rst

-Class Mesh
-==========
+Mesh
+====
 
 .. doxygenclass:: Mesh
     :members: