cmds: fix block output.

core/commands2/block.go

@@ -2,7 +2,6 @@ package commands
 
 import (
 	"bytes"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"time"
@@ -125,8 +124,7 @@ It reads from stdin, and <key> is a base58 encoded multihash.
 	Marshalers: cmds.MarshalerMap{
 		cmds.Text: func(res cmds.Response) ([]byte, error) {
 			block := res.Output().(*Block)
-			s := fmt.Sprintf("Block added (%v bytes): %s\n", block.Length, block.Key)
-			return []byte(s), nil
+			return []byte(block.Key + "\n"), nil
 		},
 	},
 }