Put each item of callables and properties on a new line

Makes it easier to see diffs.

bindings/python/generate_tests.py

@@ -61,8 +61,8 @@ import Hamlib
 '''
     filename = f"test_{object_name.replace(".", "_")}_class.py"
     class_source = inspect.getsource(TestClass)
-    expected_callables = repr(callables)
-    expected_properties = repr(properties)
+    expected_callables = repr(callables).replace(" ", "\n")
+    expected_properties = repr(properties).replace(" ", "\n")
 
     print(f"Generating {filename}")
     with open(filename, "w", encoding='utf-8') as output_file: