Style fix

Author: MichaelClerx

pints/_nested/__init__.py

@@ -234,8 +234,8 @@ class NestedController(object):
     Parameters
     ----------
     log_likelihood : pints.LogLikelihood
-        A :class:`LogLikelihood` function that evaluates points in the parameter
-        space.
+        A :class:`LogLikelihood` function that evaluates points in the
+        parameter space.
     log_prior : pints.LogPrior
         A :class:`LogPrior` function on the same parameter space.