issue with display of number
diff --git a/assets/js/add_numbers.js b/assets/js/add_numbers.js
index 3957412..8bf6ffa 100644
--- a/assets/js/add_numbers.js
+++ b/assets/js/add_numbers.js
@@ -1,7 +1,7 @@
(function() {
var pre = document.getElementsByTagName('pre'),
pl = pre.length;
- for (var i = 0; i < pl-1; i++) {
+ for (var i = 0; i < pl; i++) {
pre[i].innerHTML = '<span class="line-number"></span>' + pre[i].innerHTML + '<span class="cl"></span>';
var num = pre[i].innerHTML.split(/\n/).length;
for (var j = 0; j < num-1; j++) {
diff --git a/documentation.md b/documentation.md
index b424af7..096bc2f 100644
--- a/documentation.md
+++ b/documentation.md
@@ -274,6 +274,7 @@
Apache Wayang is also capable of iterative processing, which is, e.g., very important for machine learning algorithms, such as k-means.
#### Scala API
+
```scala
import org.apache.wayang.api._
import org.apache.wayang.core.api.{Configuration, WayangContext}
