FORMAT: fix formatting issues

bilby/core/sampler/dynesty.py

@@ -472,8 +472,8 @@ class Dynesty(NestedSampler):
                 f"{self.nact} with maximum length {self.nact * self.maxmcmc}"
             )
             from .dynesty_utils import ACTTrackingRWalk
-            ACTTrackingRWalk._cache = list()
 
+            ACTTrackingRWalk._cache = list()
             dynesty.nestedsamplers._SAMPLING["act-walk"] = ACTTrackingRWalk()
         elif sample == "rwalk_dynesty":
             sample = sample.strip("_dynesty")

bilby/core/sampler/dynesty_utils.py

@@ -180,6 +180,7 @@ class ACTTrackingRWalk:
     parallelised sampling as the length of the MCMC will be different for each
     parallel process.
     """
+
     # the _cache is a class level variable to avoid being forgotten at every
     # iteration when using multiprocessing
     self._cache = list()