Use StringBuilder in XMLPrintHandler

No need to use synchronized StringBuffer here

Change-Id: I53f2050c2301e5cf8ff7f1ef1cee093e2a594f85
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/update/configurator/XMLPrintHandler.java b/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/update/configurator/XMLPrintHandler.java
index a45176b..ae9712d 100644
--- a/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/update/configurator/XMLPrintHandler.java
+++ b/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/update/configurator/XMLPrintHandler.java
@@ -110,8 +110,8 @@
 
 	}
 
-	public static StringBuffer encode(String value) {
-		StringBuffer buf = new StringBuffer();
+	public static StringBuilder encode(String value) {
+		StringBuilder buf = new StringBuilder();
 		for (int i = 0; i < value.length(); i++) {
 			char c = value.charAt(i);
 			switch (c)