update cantera syntax

Author: JacksonBurns

test/rmgpy/reactionTest.py

@@ -2954,7 +2954,7 @@ def test_pdep_arrhenius(self):
             # Check that the reaction string is the same
             assert repr(converted_obj) == repr(ct_obj)
             # Check that the Arrhenius rates are identical
-            assert str(converted_obj.rate) == str(ct_obj.rate)
+            assert converted_obj.PlogRate.rate == ct_obj.PlogRate.rate
 
     def test_multi_pdep_arrhenius(self):
         """
@@ -2975,7 +2975,7 @@ def test_multi_pdep_arrhenius(self):
                 # Check that the reaction string is the same
                 assert repr(converted_rxn) == repr(ct_rxn)
                 # Check that the Arrhenius rates are identical
-                assert str(converted_rxn.rate) == str(ct_rxn.rate)
+                assert converted_rxn.PlogRate.rate == ct_rxn.PlogRate.rate
 
     def test_chebyshev(self):
         """