Add example to __eq__

Author: bobleesj

src/diffpy/utils/diffraction_objects.py

@@ -196,7 +196,16 @@ def __add__(self, other):
             Raised when the length of the xarrays of the two DiffractionObject instances do not match.
         TypeError
             Raised when the type of `other` is not an instance of DiffractionObject, int, or float.
+        
+        Examples
+        --------
+        Add a scalar value to the xarrays of the DiffractionObject instance:
+        >>> new_do = my_do + 10.1
+        
+        Add the xarrays of two DiffractionObject instances:
+        >>> new_do = my_do_1 + my_do_2
         """
+        
         summed_do = deepcopy(self)
         # Add scalar value to all xarrays by broadcasting
         if isinstance(other, (int, float)):