Sort the output of temperature dictionary

openmc/settings.py

@@ -1053,7 +1053,7 @@ def _create_no_reduce_subelement(self):
 
     def _create_temperature_subelements(self):
         if self.temperature:
-            for key, value in self.temperature.items():
+            for key, value in sorted(self.temperature.items()):
                 element = ET.SubElement(self._settings_file,
                                         "temperature_{}".format(key))
                 element.text = str(value)

tests/test_multipole/inputs_true.dat

@@ -1 +1 @@
-28e3b5cba12061ff7c410585117d40425d830a53fa2e7324d8f96deee28a57fb4cc4de393aa600f44816e72a0f66f22f5f4c65d52977d99f6a0d53275d263067
+2be927608035759f52a2ac88b2c84e28c06e0f7905187bfd4695fecd80f417e727d8879c52fe03253938f7aa0301061f72dce9b5ae46b8675049b5bc4d9525a0

tests/test_multipole/test_multipole.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-from collections import OrderedDict
 import os
 import sys
 sys.path.insert(0, os.pardir)
@@ -69,9 +68,7 @@ def _build_inputs(self):
         sets_file.particles = 1000
         sets_file.source = Source(space=Box([-1, -1, -1], [1, 1, 1]))
         sets_file.output = {'summary': True}
-        sets_file.temperature = OrderedDict()
-        sets_file.temperature['tolerance'] = 1000
-        sets_file.temperature['multipole'] = True
+        sets_file.temperature = {'tolerance': 1000, 'multipole': True}
         sets_file.export_to_xml()
 
         ####################