Removed an extra *so* from a paragraph

Author: Ovidiu Voicu

1-js/02-first-steps/01-hello-world/article.md

@@ -2,7 +2,7 @@
 
 The tutorial that you're reading is about the core JavaScript, that is platform-independant. Further on you will be able learn Node.JS and other platforms that use it.
 
-But we need a working environment to run our scripts, and, just because this book is online, the browser a good choice. We'll keep the amount of browser-specific commands (like `alert`) to minimum, so that you don't spend time on them if you plan to concentrate on another environment like Node.JS. From the other hand, browser details are explained in detail in the [next part](/ui) of the tutorial. So
+But we need a working environment to run our scripts, and, just because this book is online, the browser a good choice. We'll keep the amount of browser-specific commands (like `alert`) to minimum, so that you don't spend time on them if you plan to concentrate on another environment like Node.JS. From the other hand, browser details are explained in detail in the [next part](/ui) of the tutorial.
 
 So first let's see how to attach a script to the webpage. For server-side environments  you can just execute it with a command like `"node my.js"` for Node.JS.