Add handling for : in bond types for aromatic bonds (#60)

Author: CalCraven

forcefield_utilities/gmso_xml.py

@@ -469,7 +469,7 @@ def to_gmso_potentials(self, default_units):
                 identifier = bond_type.types
 
             elif bond_type.classes:
-                class1, class2 = re.split(r"[\~\-\=\#]+", bond_type.classes)
+                class1, class2 = re.split(r"[\~\-\=\#\:]+", bond_type.classes)
                 bond_type_dict["member_classes"] = (
                     class1,
                     class2,
@@ -887,7 +887,7 @@ def to_gmso_potentials(self, default_units):
             elif torsion_type.classes:
                 # TODO: Set bond orders
                 class1, class2, class3, class4 = re.split(
-                    r"[\~\-\=\#]+", torsion_type.classes
+                    r"[\~\-\=\#\:]+", torsion_type.classes
                 )
                 torsion_dict["member_classes"] = (
                     class1,