nodetool snapshot does not handle keyspace arguments correctly

Given the following invocation:
./bin/nodetool snapshot Keyspace1 -t keyspace1_snapshot -h localhost

Snapshots are made for all keyspaces

Given a multi-keyspace invocation:
./bin/nodetool snapshot Keyspace1 Keyspace2 Keyspac3 -t keyspace1_snapshot -h localhost

Snapshots will be made for Keyspace2 and Keyspace3 but not Keyspace1.

It appears there is just some antiquated command argument noodling in NodeCmd#handleSnapshots