Bulk migration to Python 3.6 f-strings (ansible-collections#1810)

Bulk migration to Python 3.6 f-strings

SUMMARY
We've dropped support for Python <3.6, bulk migrate to fstrings and perform some general string cleanup
A combination of

black --preview
flynt
some manual cleanup

ISSUE TYPE

Feature Pull Request

COMPONENT NAME
plugins/
tests/
ADDITIONAL INFORMATION

Reviewed-by: Alina Buzachis

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@de33821

plugins/modules/api_gateway.py

@@ -248,7 +248,7 @@ def get_api_definitions(module, swagger_file=None, swagger_dict=None, swagger_te
             with open(swagger_file) as f:
                 apidata = f.read()
         except OSError as e:
-            msg = "Failed trying to read swagger file {0}: {1}".format(str(swagger_file), str(e))
+            msg = f"Failed trying to read swagger file {str(swagger_file)}: {str(e)}"
             module.fail_json(msg=msg, exception=traceback.format_exc())
     if swagger_dict is not None:
         apidata = json.dumps(swagger_dict)
@@ -281,7 +281,7 @@ def delete_rest_api(module, client, api_id):
     try:
         delete_response = delete_api(client, api_id)
     except (botocore.exceptions.ClientError, botocore.exceptions.EndpointConnectionError) as e:
-        module.fail_json_aws(e, msg="deleting API {0}".format(api_id))
+        module.fail_json_aws(e, msg=f"deleting API {api_id}")
     return delete_response
 
 
@@ -299,7 +299,7 @@ def ensure_api_in_correct_state(module, client, api_id, api_data):
     try:
         configure_response = configure_api(client, api_id, api_data=api_data)
     except (botocore.exceptions.ClientError, botocore.exceptions.EndpointConnectionError) as e:
-        module.fail_json_aws(e, msg="configuring API {0}".format(api_id))
+        module.fail_json_aws(e, msg=f"configuring API {api_id}")
 
     deploy_response = None
 
@@ -308,7 +308,7 @@ def ensure_api_in_correct_state(module, client, api_id, api_data):
         try:
             deploy_response = create_deployment(client, api_id, **module.params)
         except (botocore.exceptions.ClientError, botocore.exceptions.EndpointConnectionError) as e:
-            msg = "deploying api {0} to stage {1}".format(api_id, stage)
+            msg = f"deploying api {api_id} to stage {stage}"
             module.fail_json_aws(e, msg)
 
     return configure_response, deploy_response