Added the Arabic Eloquent JavaScript (#4990)

* Added the Arabic Eloquent JS

Added a link to the Arabic translation of Eloquent JS.

* Correcting the number of empty spaces

free-programming-books-ar.md

@@ -3,6 +3,7 @@
 * [Arduino](#arduino)
 * [HTML/CSS](#htmlcss)
 * [Introduction to Programming in Arabic](#introduction-to-programming-in-arabic)
+* [JavaScript](#javascript)
 * [Linux](#linux)
 * [Open Source Software](#open-source-software)
 * [Operating System](#operating-systems)
@@ -34,6 +35,11 @@
 * [مختصر دليل لغات البرمجة ](https://alyassen.github.io/Brief-guide-to-programming-languages-v1.2.4.pdf) (PDF)
 
 
+### JavaScript
+
+* [Eloquent Javascript](https://rabahboudia.gitbooks.io/arabic-eloquent-js/content/index.html) - Marijn Haverbeke (HTML)
+
+
 ### Linux
 
 * [أوبنتو السهل](http://librebooks.org/simply-ubuntu/)