small edits

Author: sbillinge

src/diffpy/utils/scattering_objects/__init__.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+##############################################################################
+#
+# diffpy.utils      by DANSE Diffraction group
+#                   Simon J. L. Billinge
+#                   (c) 2010 The Trustees of Columbia University
+#                   in the City of New York.  All rights reserved.
+#
+# File coded by:    Simon Billinge
+#
+# See AUTHORS.txt for a list of people who contributed.
+# See LICENSE_DANSE.txt for license information.
+#
+##############################################################################
+
+"""Scattering objects
+"""
+
+# End of file

src/diffpy/utils/scattering_objects/diffraction_objects.py

@@ -26,7 +26,7 @@ def __add__(self, other):
             summed.on_tth[1] = self.on_tth[1] + other
             summed.on_q[1] = self.on_q[1] + other
         elif not isinstance(other, Diffraction_object):
-            raise TypeError(f"I only know how to sum two Scattering_object objects")
+            raise TypeError(f"I only know how to sum two Diffraction_object objects")
         elif self.on_tth[0].all() != other.on_tth[0].all():
             raise RuntimeError(f"objects are not on the same x-grid. You may add them using the self.add method and"
                                f"specifying how to handle the mismatch.")