snapshot_ctl: cleanup true_snapshots_size
snapshot_ctl: cleanup true_snapshots_size

Cleanup indentation and s/local_total/total/
as it is

Signed-off-by: Benny Halevy <23c997c90eb8537635e9392d48e7af1bf1b2ca22@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla