Fixed docstring

Author: mtortora

polykit/renderers/backends.py

@@ -98,7 +98,7 @@ def _fresnel(self,
                  roughness=0.2,
                  outline=0.05):
         """
-        Render individual polymer conformations within IPython notebooks using the Fresnel backend
+        Render individual polymer/particle configurations using the Fresnel backend library
             
         Parameters
         ----------