Simplify control example browser tab content loading

Going symbol by symbol nowadays is just time lost and even makes code
harder to read.

Author: akurtakov

examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/controlexample/BrowserTab.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2018 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -20,6 +20,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.util.stream.Collectors;
 
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTError;
@@ -118,17 +119,13 @@ void createExampleWidgets () {
 		} else if (lastText != null) {
 			browser.setText(lastText);
 		} else {
-			StringBuilder sb= new StringBuilder(300);
-
+			String text= "";
 			try (InputStream htmlStream = ControlExample.class.getResourceAsStream("browser-content.html");
 					BufferedReader br = new BufferedReader(new InputStreamReader(htmlStream))) {
-				int read = 0;
-				while ((read = br.read()) != -1)
-					sb.append((char) read);
+				text= br.lines().collect(Collectors.joining("\n"));
 			} catch (IOException e) {
 				log(e.getMessage());
 			}
-			String text= sb.toString();
 			browser.setText(text);
 		}
 		lastText = lastUrl = null;