uppercase output in docker info related to swarm mode

Signed-off-by: allencloud <allen.sun@daocloud.io>

api/client/system/info.go

@@ -91,13 +91,13 @@ func runInfo(dockerCli *client.DockerCli) error {
 			fmt.Fprintf(dockerCli.Out(), " Orchestration:\n")
 			fmt.Fprintf(dockerCli.Out(), "  Task History Retention Limit: %d\n", info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit)
 			fmt.Fprintf(dockerCli.Out(), " Raft:\n")
-			fmt.Fprintf(dockerCli.Out(), "  Snapshot interval: %d\n", info.Swarm.Cluster.Spec.Raft.SnapshotInterval)
-			fmt.Fprintf(dockerCli.Out(), "  Heartbeat tick: %d\n", info.Swarm.Cluster.Spec.Raft.HeartbeatTick)
-			fmt.Fprintf(dockerCli.Out(), "  Election tick: %d\n", info.Swarm.Cluster.Spec.Raft.ElectionTick)
+			fmt.Fprintf(dockerCli.Out(), "  Snapshot Interval: %d\n", info.Swarm.Cluster.Spec.Raft.SnapshotInterval)
+			fmt.Fprintf(dockerCli.Out(), "  Heartbeat Tick: %d\n", info.Swarm.Cluster.Spec.Raft.HeartbeatTick)
+			fmt.Fprintf(dockerCli.Out(), "  Election Tick: %d\n", info.Swarm.Cluster.Spec.Raft.ElectionTick)
 			fmt.Fprintf(dockerCli.Out(), " Dispatcher:\n")
-			fmt.Fprintf(dockerCli.Out(), "  Heartbeat period: %s\n", units.HumanDuration(time.Duration(info.Swarm.Cluster.Spec.Dispatcher.HeartbeatPeriod)))
-			fmt.Fprintf(dockerCli.Out(), " CA configuration:\n")
-			fmt.Fprintf(dockerCli.Out(), "  Expiry duration: %s\n", units.HumanDuration(info.Swarm.Cluster.Spec.CAConfig.NodeCertExpiry))
+			fmt.Fprintf(dockerCli.Out(), "  Heartbeat Period: %s\n", units.HumanDuration(time.Duration(info.Swarm.Cluster.Spec.Dispatcher.HeartbeatPeriod)))
+			fmt.Fprintf(dockerCli.Out(), " CA Configuration:\n")
+			fmt.Fprintf(dockerCli.Out(), "  Expiry Duration: %s\n", units.HumanDuration(info.Swarm.Cluster.Spec.CAConfig.NodeCertExpiry))
 		}
 		fmt.Fprintf(dockerCli.Out(), " Node Address: %s\n", info.Swarm.NodeAddr)
 	}