[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

exactdiag/cache.py

@@ -58,7 +58,6 @@ def getsizeof(obj, seen=None):
 
 
 class AbstractCache(abc.MutableMapping, ABC):
-
     RAND = "RAND"
     FIFO = "FIFO"
     LRU = "LRU"
@@ -147,7 +146,6 @@ def __repr__(self):
 
 
 class EigenCache(AbstractCache):
-
     FILE_PREFIX = "eig_"
 
     def __init__(self, root="", maxcount=0, maxsize=0, policy="FIFO", autosave=True):