Comment / docstring review updates

Author: jonmmease

codegen/datatypes.py

@@ -106,10 +106,7 @@ class {datatype_class}({node.name_base_datatype}):\n""")
     # ### Property definitions ###
     child_datatype_nodes = node.child_datatypes
 
-    # Order so that mapped nodes come first, this way the unmapped properties
-    # take precedence
     subtype_nodes = child_datatype_nodes
-
     for subtype_node in subtype_nodes:
         if subtype_node.is_array_element:
             prop_type = (f"tuple[plotly.graph_objs{node.dotpath_str}." +

codegen/utils.py

@@ -1224,7 +1224,7 @@ class MappedPropNode(PlotlyNode):
     def __init__(self, mapped_prop_node, parent,
                  prop_name, plotly_schema):
         """
-        Create node that represents legacy a title property.
+        Create node that represents a legacy title property.
         e.g. layout.titlefont.  These properties are now subproperties under
         the sibling `title` property. e.g. layout.title.font.