Fix the ASCII art

Signed-off-by: stack <stack@apache.org>
My first commit! Adding myself to the team
HBASE-9763 Scan javadoc doesn't fully capture semantics of start and stop row (Gabriel Reid)
HBASE-12648 Document per-cell TTLs (Andrew Purtell)
HBASE-12668 Adapt PayloadCarryingRpcController so it can also be used in an async way

Signed-off-by: stack <stack@apache.org>
HBASE-12678 HBCK should print command line arguments