Actually, the standard method for putting multiple records in a file applies to files read by Cloverleaf. The record/message separator is a line feed (new line). This is how most everyone puts multiple records in a file.
Your test file only has one message in it but if it had two then you’d need a line feed between the two messages. So, your messages are a group of VRL’s where each VRL is separated by a carriage return. Pretty much the same as an HL7 batch of messages in a file.