Minor formating change to code sample.

src/docs/asciidoc/jme3/advanced/nifty_gui_java_layout.adoc

@@ -687,7 +687,7 @@ public class Screen extends BaseAppState {
                     // add text
                     text(new TextBuilder() {{
                         text("Here goes some text describing the game and the rules and stuff. "
-                                + "Incidentally, the text is quite long and needs to wrap at the end of lines. ");
+                           + "Incidentally, the text is quite long and needs to wrap at the end of lines. ");
                         font("Interface/Fonts/Arial.fnt");
                         wrap(true);
                         height("100%");