see if all sections in the current snapshot report are relevant to do_test
clarify the meaning of props, maybe rename "IOError" to "unreadable"
in the run @1 the section 'Details about tests that failed to take all snapshots' tells that 2 scripts failed to take all snapshots but lists only one,
maybe split that category in two: 'scripts with treacebacks' and 'scripts without tracebacks that failed to take all snapshots'
as noted elsewhere, maybe snapshots with filesize 0 should be reported