Fix flake8

src/hdmf/container.py

@@ -179,7 +179,7 @@ def __new__(cls, *args, **kwargs):
         """
         Static method of the object class called by Python to create the object first and then
          __init__() is called to initialize the object's attributes.
-        
+
         NOTE: this method is called directly from ObjectMapper.__new_container__ during the process of
         constructing the object from builders that are read from a file.
         """
@@ -191,7 +191,7 @@ def __new__(cls, *args, **kwargs):
         inst.__children = list()
         inst.__modified = True
         inst.__object_id = kwargs.pop('object_id', str(uuid4()))
-        # this variable is being passed in from ObjectMapper.__new_container__ and is 
+        # this variable is being passed in from ObjectMapper.__new_container__ and is
         # reset to False in that method after the object has been initialized by __init__
         inst._in_construct_mode = kwargs.pop('in_construct_mode', False)
         inst.parent = kwargs.pop('parent', None)