Increase docstring consistency (#11932)

* Increase docstring consistency

* Update util.py

* Update tensor_shape.py

These comparison examples need parenthesis to work properly.

* Update math_ops.py

Set values to `start`, `limit`, and `delta`

Author: taehoonlee

parser.py

@@ -1488,7 +1488,7 @@ def __str__(self):
 def _get_defined_in(py_object, parser_config):
   """Returns a description of where the passed in python object was defined.
 
-  Arguments:
+  Args:
     py_object: The Python object.
     parser_config: A ParserConfig object.