This is a problem of presentation or standard format of log?
For me, to choose, I prefer the multilines solution.
I imagine 60 files on 1 line...
I see your point, but it doesn't work with any sort of log analysis as a list.
Recording log data is useless unless you have a way of harvesting the data.
Imagine searching through a 2,000 lines of log to find an entry.
When its all on one line it should just wrap your 60 items, but they will be placed
in the proper section. As a list they fall in the same section as date - big mess.
It could be very useful if archive logged the same way