fixed refs

docs/source/index.rst

@@ -17,7 +17,7 @@ Birdhouse is the home of the following WPS components (birds):
 * :ref:`Malleefowl <malleefowl:introduction>`: access to climate data (ESGF, ...) as a service and library
 * :ref:`Flyingpigeon <flyingpigeon:introduction>`: services for the climate impact community
 * :ref:`Hummingbird <hummingbird:introduction>`: provides cdo and cfchecker as a service
-* :ref:`Emu <emu:introduction>`_: some example WPS processes
+* :ref:`Emu <emu:introduction>`: some example WPS processes
 * `Birdy <http://birdy.readthedocs.org/en/latest/>`_: a WPS command line tool
 
 You can find the source code for all Birdhouse components on