NodePathExpression: Fix code formatting

Author: bertrand-lorentz

src/main/java/eu/europa/ted/efx/model/expressions/path/NodePathExpression.java

@@ -9,7 +9,8 @@ public class NodePathExpression extends PathExpression.Impl<EfxDataType.Node> {
   public NodePathExpression(final String script) {
     super(script, EfxDataType.Node.class);
   }
-    public static NodePathExpression empty() {
+
+  public static NodePathExpression empty() {
     return new NodePathExpression("");
   }
 }