Make syntax highlighting explicit in docs

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_analysis_model.py

@@ -33,7 +33,9 @@ class Usecase:
         :return: The newly created IfcStructuralAnalysisModel
         :rtype: ifcopenshell.entity_instance.entity_instance
 
-        Example::
+        Example:
+
+        .. code:: python
 
             # Create a fresh blank structural analysis
             analysis = ifcopenshell.api.run("structural.add_structural_analysis_model", model)

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_boundary_condition.py

@@ -39,7 +39,9 @@ class Usecase:
         :return: The newly created IfcBoundaryCondition
         :rtype: ifcopenshell.entity_instance.entity_instance
 
-        Example::
+        Example:
+
+        .. code:: python
 
             ifcopenshell.api.run("structural.add_structural_boundary_condition", model, connection=connection)
         """

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_load.py

@@ -36,7 +36,9 @@ class Usecase:
             specified.
         :rtype: ifcopenshell.entity_instance.entity_instance
 
-        Example::
+        Example:
+
+        .. code:: python
 
             # Create a simple linear load
             ifcopenshell.api.run("structural.add_structural_load", model)