Small refactor and isort+black formatting

src/pyrmv/enums/search_mode.py

@@ -1,6 +1,8 @@
 from enum import auto
+
 from .auto_name import AutoName
 
+
 class SearchMode(AutoName):
     """Enumeration used to declare types of HIM search modes."""
 
@@ -11,4 +13,4 @@ class SearchMode(AutoName):
     "Iterate over all HIM messages available."
 
     TFMATCH = auto()
-    "Uses filters defined `metas` parameter."
+    "Uses filters defined `metas` parameter."