chore(rc-cache): synced with CE code

rhodecode/lib/rc_cache/backends.py

@@ -98,7 +98,7 b' class PickleSerializer:'
     )
 
 
-class MsgPackSerializer(object):
+class MsgPackSerializer:
     serializer: None | Serializer = staticmethod(  # type: ignore
         msgpack.packb
     )
@@ -291,7 +291,7 b' class RedisMsgPackBackend(MsgPackSeriali'
 def get_mutex_lock(client, lock_key, lock_timeout, auto_renewal=False):
     from rhodecode.lib._vendor import redis_lock
 
-    class _RedisLockWrapper(object):
+    class _RedisLockWrapper:
         """LockWrapper for redis_lock"""
 
         @classmethod

rhodecode/lib/rc_cache/utils.py

@@ -45,7 +45,7 b' def isCython(func):'
 class RhodeCodeCacheRegion(CacheRegion):
 
     def __repr__(self):
-        return f'{self.__class__}(name={self.name})'
+        return f'`{self.__class__.__name__}(name={self.name}, backend={self.backend.__class__})`'
 
     def conditional_cache_on_arguments(
             self, namespace=None,
@@ -250,7 +250,6 b' def clear_cache_namespace(cache_region: '
 
     if method == CLEAR_DELETE:
         num_affected_keys = cache_region.backend.delete_multi_by_prefix(prefix=cache_namespace_uid)
-
     return num_affected_keys