Trying to combine multiple lines if it doesn't have an end of message string. Would also like to remove the prefix on all but the first line.
Input:
b929e3e1-29db this is a long message that
abc074df-48a1 is continued onto multiple
dfd4c683-ab48 lines#EOM
ff513a72-570d this is a short message#EOM
980d10aa-bbed another short message#EOM
Output:
b929e3e1-29db this is a long message that is continued onto multiple lines
ff513a72-570d this is a short message
980d10aa-bbed another short message
Ideally using common tools available via command line. (ex: awk, sed)