fix : spelling mistake

cmd/dfdaemon/app/init.go

@@ -57,7 +57,7 @@ func adjustSupernodeList(nodes []string) []string {
 	}
 }
 
-// getLocalIP return the localIP which connects to supper node
+// getLocalIP return the localIP which connects to super node
 func getLocalIP(nodes []string) (localIP string) {
 	var (
 		e error

docs/user_guide/install_client.md

@@ -119,11 +119,11 @@ Or you can build your own dfclient executable files.
 
 **NOTE:** You can ignore this step when using only dfget for file distribution .
 
-    ```sh
-    # Replace ${supernode} with your own supernode node with format `ip:port=weight`.
-    SUPERNODE=$supernode
-    dfdaemon --node $SUPERNODE
-    ```
+```sh
+# Replace ${supernode} with your own supernode node with format `ip:port=weight`.
+SUPERNODE=$supernode
+dfdaemon --node $SUPERNODE
+```
 
 ## After this Task