Comment 2 for bug 1274369

Tacking this quasi related feature request rather than a new bug..

Clarify dry run logging. Sample:

2014-06-03 07:47:34,374 [INFO] Executing: /usr/bin/mysqldump --defaults-file=/var/spool/holland/default/20140603_074701/my.cnf --flush-privileges --max-allowed-packet=128M --lock-tables mysql
2014-06-03 07:47:34,387 [INFO] Backup completed in 32.51 seconds
2014-06-03 07:47:34,388 [WARNING] Extremely low free space on /var/spool/holland/default/20140603_074701's filesystem (/).
2014-06-03 07:47:34,388 [WARNING] 68.82MB of 84.83GB [0.08%] remaining
2014-06-03 07:47:34,397 [INFO] --- Ending dry run ---

2014-06-03 07:47:34,374 [INFO] Would execute: /usr/bin/mysqldump --defaults-file=/var/spool/holland/default/20140603_074701/my.cnf --flush-privileges --max-allowed-packet=128M --lock-tables mysql
2014-06-03 07:47:34,387 [INFO] Backup dry run completed in 32.51 seconds