Improve formatting after previous commit

cloud/amazon/ec2.py

@@ -919,8 +919,9 @@ def create_instances(module, ec2, override_count=None):
                 # The instances returned through ec2.run_instances above can be in
                 # terminated state due to idempotency. See commit 7f11c3d for a complete
                 # explanation.
-                terminated_instances = [ str(instance.id) for instance in res.instances
+                terminated_instances = [
-                                        if instance.state == 'terminated' ]
+                    str(instance.id) for instance in res.instances if instance.state == 'terminated'
+                ]
                 if terminated_instances:
                     module.fail_json(msg = "Instances with id(s) %s " % terminated_instances +
                                            "were created previously but have since been terminated - " +