Update Portenta_H7_AsyncWebResponseImpl.h

Check OK. Reformat

Author: khoih-prog

src/Portenta_H7_AsyncWebResponseImpl.h

@@ -1,16 +1,16 @@
 /****************************************************************************************************************************
-  AsyncWebResponseImpl_STM32.h
-  
+  Portenta_H7_AsyncWebResponseImpl.h
+
   For Portenta_H7 (STM32H7) with Vision-Shield Ethernet
-  
+
   Portenta_H7_AsyncWebServer is a library for the Portenta_H7 with with Vision-Shield Ethernet
-  
+
   Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
   Built by Khoi Hoang https://github.com/khoih-prog/Portenta_H7_AsyncWebServer
   Licensed under GPLv3 license
- 
+
   Version: 1.4.0
-  
+
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
   1.0.0   K Hoang      06/10/2021 Initial coding for Portenta_H7 (STM32H7) with Vision-Shield Ethernet
@@ -45,7 +45,7 @@ class AsyncBasicResponse: public AsyncWebServerResponse
   private:
     String _content;
     char *_contentCstr;      // RSMOD
-	String _partialHeader;
+    String _partialHeader;
 
   public:
     AsyncBasicResponse(int code, const String& contentType = String(), const String& content = String());