- assert not invalid_nova_servers, \
- "Invalid OS::Nova::Server resource ids detected {}\n" \
- "OS::Nova::Server resource ids must be in the form " \
- "<vm_type>_server_<vm_type_index> \n" \
- "<vm_type> is derived from flavor, image and name properties " \
+ assert not invalid_nova_servers, (
+ "Invalid OS::Nova::Server resource ids detected {}. "
+ "OS::Nova::Server resource ids must be in the form "
+ "{{vm_type}}_server_{{vm_type_index}} where "
+ "{{vm_type}} is derived from flavor, image and name properties."