Some Black formatter issues

cmdx.py

@@ -268,16 +268,16 @@ def add_metaclass(metaclass):
 
     def wrapper(cls):
         orig_vars = cls.__dict__.copy()
-        slots = orig_vars.get('__slots__')
+        slots = orig_vars.get("__slots__")
         if slots is not None:
             if isinstance(slots, str):
                 slots = [slots]
             for slots_var in slots:
                 orig_vars.pop(slots_var)
-        orig_vars.pop('__dict__', None)
-        orig_vars.pop('__weakref__', None)
-        if hasattr(cls, '__qualname__'):
-            orig_vars['__qualname__'] = cls.__qualname__
+        orig_vars.pop("__dict__", None)
+        orig_vars.pop("__weakref__", None)
+        if hasattr(cls, "__qualname__"):
+            orig_vars["__qualname__"] = cls.__qualname__
         return metaclass(cls.__name__, cls.__bases__, orig_vars)
     return wrapper
 
@@ -2843,7 +2843,7 @@ def isArray(self):
     @property
     def arrayIndices(self):
         if not self._mplug.isArray:
-            raise TypeError('{} is not an array'.format(self.path()))
+            raise TypeError("{} is not an array".format(self.path()))
 
         # Convert from `p_OpenMaya_py2.rItemNot3Strs` to list
         return list(self._mplug.getExistingArrayAttributeIndices())
@@ -3806,10 +3806,15 @@ def connections(self,
             2
             >>> b["arrayAttr"] = Long(array=True)
             >>> b["arrayAttr"][0] >> a["ihi"]
+            >>> b["arrayAttr"][1] >> a["visibility"]
             >>> a["ihi"].connection() == b
             True
             >>> a["ihi"].connection(plug=True) == b["arrayAttr"][0]
             True
+            >>> a["visibility"].connection(plug=True) == b["arrayAttr"][1]
+            True
+            >>> b["arrayAttr"][1].connection(plug=True) == a["visibility"]
+            True
 
         """