From 351d04bb3212ba8ca3d869d2b8f11b7b01197757 Mon Sep 17 00:00:00 2001
From: Mathieu Carbou <mathieu.carbou@gmail.com>
Date: Sun, 9 Jun 2024 12:26:46 +0200
Subject: [PATCH] concat() to avoid a re-assignment

---
 src/AsyncWebSocket.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/AsyncWebSocket.cpp b/src/AsyncWebSocket.cpp
index b34d90e..df6821d 100644
--- a/src/AsyncWebSocket.cpp
+++ b/src/AsyncWebSocket.cpp
@@ -1292,8 +1292,8 @@ AsyncWebSocketResponse::AsyncWebSocketResponse(const String& key, AsyncWebSocket
 #else
     String k;
     k.reserve(key.length() + WS_STR_UUID_LEN);
-    k += key;
-    k += WS_STR_UUID;
+    k.concat(key);
+    k.concat(WS_STR_UUID);
     SHA1Builder sha1;
     sha1.begin();
     sha1.add((const uint8_t*)k.c_str(), k.length());