[style] - Update code styling

Author: william051200

src/azure-cli/azure/cli/command_modules/vm/_vm_utils.py

@@ -771,8 +771,7 @@ def assign_identity(cli_ctx, getter, setter, identity_role=None, identity_scope=
 
     # create role assignment:
     if identity_scope:
-        principal_id = resource.get('identity', {}).get('principalId') or \
-                       resource.get('identity', {}).get('principal_id')
+        principal_id = resource.get('identity', {}).get('principalId') or resource.get('identity', {}).get('principal_id')
 
         identity_role_id = resolve_role_id(cli_ctx, identity_role, identity_scope)
         assignments_client = get_mgmt_service_client(cli_ctx, ResourceType.MGMT_AUTHORIZATION).role_assignments