[FIX] The Properties is always null

src/main/java/net/sourceforge/plantuml/servlet/utility/Configuration.java

@@ -37,7 +37,7 @@ public class Configuration {
      * Singleton constructor
      */
     private Configuration() {
-		Properties config = new Properties();
+        config = new Properties();
 
         // Default values
         config.setProperty("SHOW_SOCIAL_BUTTONS", "off");
@@ -45,8 +45,7 @@ public class Configuration {
         // End of default values
 
         try {
-			InputStream is = Thread.currentThread().getContextClassLoader().
-	            getResourceAsStream("config.properties");
+            InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("config.properties");
             if (is != null) {
                 config.load(is);
                 is.close();