added missing f to f-string

inventory_provider/tasks/data.py

@@ -20,7 +20,7 @@ def build_service_interface_user_list(config):
             k = k.decode('utf-8')
             m = re.match('^netconf-interfaces:([^:]+):(.+)$', k)
             if not m:
-                logger.error('invalid redis key: "{k}"')
+                logger.error(f'unexpected redis key: "{k}"')
                 continue  # skip, rather than fail the entire update
             router_name = m.group(1)
             ifc_name = m.group(2)