Merge branch 'farhan-anjum/FSSDK-11175-add-decision-service-methods-for-cmab' into farhan-anjum/FSSDK-11184-update-impression-event-for-cmab

Author: FarhanAnjum-opti

optimizely/decision_service.py

@@ -186,7 +186,7 @@ def _get_decision_for_cmab_experiment(
         except Exception as e:
             error_message = Errors.CMAB_FETCH_FAILED_DETAILED.format(experiment.key)
             if self.logger:
-                self.logger.error(f"{error_message} {str(e)}")
+                self.logger.error(f'{error_message} {str(e)}')
             return {
                 "error": True,
                 "result": None,