added newline at the end of file

tests/src/test/scala/runtime/actionContainers/Python3AiActionContainerTests.scala

@@ -31,4 +31,4 @@ class Python3AiActionContainerTests extends PythonActionContainerTests with WskA
 
   /** indicates if strings in python are unicode by default */
   override lazy val pythonStringAsUnicode = true
-}
\ No newline at end of file
+}