more cleanup up of build files + indentation
diff --git a/aos/common/network/SendSocket.cpp b/aos/common/network/SendSocket.cpp
index 89665dc..78aca79 100644
--- a/aos/common/network/SendSocket.cpp
+++ b/aos/common/network/SendSocket.cpp
@@ -18,24 +18,24 @@
     return ret;
   }
 
-	if (connect(socket_, &addr_.addr,
+  if (connect(socket_, &addr_.addr,
               sizeof(addr_)) < 0) {
     LOG(ERROR, "couldn't connect to ip '%s' because of %d: %s\n", robot_ip,
         errno, strerror(errno));
     last_ret_ = 1;
   }
 
-	hold_msg_len_ = 0;
+  hold_msg_len_ = 0;
   return last_ret_ = 0;
 }
 
 int SendSocket::SendHoldMsg() {
-	if (hold_msg_len_ > 0) {
-		int val = Send(hold_msg_, hold_msg_len_);
-		hold_msg_len_ = 0;
-		return val;
-	}
-	return -1;
+  if (hold_msg_len_ > 0) {
+    int val = Send(hold_msg_, hold_msg_len_);
+    hold_msg_len_ = 0;
+    return val;
+  }
+  return -1;
 }
 
 } // namespace aos