On YAML, not if you enforce the usage of document end markers (e.g. an optional feature one could require if their use case demanded it). Though that's rarely a

On YAML, not if you enforce the usage of document end markers (e.g. an optional feature one could require if their use case demanded it). Though that's rarely a concern for configuration file formats in my opinion. If your transport (or storage) layer is that unreliable you probably don't need a human readable format in the first place.