feature: add __str__ methods to queryLineage output classes

Author: Yi-Ting Lee

src/sagemaker/lineage/query.py

@@ -93,7 +93,7 @@ def __eq__(self, other):
         )
 
     def __str__(self):
-        """Define string representation of `Edge`."""
+        """Define string representation of ``Edge``."""
         return (str(self.__dict__))
 
 
@@ -135,7 +135,7 @@ def __eq__(self, other):
         )
 
     def __str__(self):
-        """Define string representation of `Vertex`."""
+        """Define string representation of ``Vertex``."""
         return (str(self.__dict__))
 
     def to_lineage_object(self):
@@ -208,7 +208,7 @@ def __init__(
             self.vertices = vertices
 
     def __str__(self):
-        """Define string representation of `LineageQueryResult`."""
+        """Define string representation of ``LineageQueryResult``."""
         result_dict = vars(self)
         return (str({k: [vars(val) for val in v] for k, v in result_dict.items()}))