Simple check to differentiate between stdin flag or value that contains

a -

command/kv_put.go

@@ -229,9 +229,13 @@ func (c *KVPutCommand) dataFromArgs(args []string) (string, string, error) {
 		return key, string(data), nil
 	case '-':
 		var b bytes.Buffer
+		if len(data) > 1 {
+			return key, data, nil
+		} else {
 			if _, err := io.Copy(&b, stdin); err != nil {
 				return "", "", fmt.Errorf("Failed to read stdin: %s", err)
 			}
+		}
 		return key, b.String(), nil
 	default:
 		return key, data, nil