Add spaces before comments.

Author: octalmage

README.md

@@ -44,10 +44,10 @@ If you need to build RobotJS, see the [building](#building) section. Instruction
 <p align="center"><img src="https://cldup.com/lugVjjAkEi.gif"></p>
 
 ```JavaScript
-//Move the mouse across the screen as a sine wave.
+// Move the mouse across the screen as a sine wave.
 var robot = require("robotjs");
 
-//Speed up the mouse.
+// Speed up the mouse.
 robot.setMouseDelay(2);
 
 var twoPI = Math.PI * 2.0;
@@ -65,26 +65,26 @@ for (var x = 0; x < width; x++)
 ##### [Keyboard](https://github.com/octalmage/robotjs/wiki/Syntax#keyboard)
 
 ```JavaScript
-//Type "Hello World" then press enter.
+// Type "Hello World" then press enter.
 var robot = require("robotjs");
 
-//Type "Hello World".
+// Type "Hello World".
 robot.typeString("Hello World");
 
-//Press enter. 
+// Press enter.
 robot.keyTap("enter");
 ```
 
 ##### [Screen](https://github.com/octalmage/robotjs/wiki/Syntax#screen)
 
 ```JavaScript
-//Get pixel color under the mouse. 
+// Get pixel color under the mouse.
 var robot = require("robotjs");
 
-//Get mouse position. 
+// Get mouse position.
 var mouse = robot.getMousePos();
 
-//Get pixel color in hex format. 
+// Get pixel color in hex format.
 var hex = robot.getPixelColor(mouse.x, mouse.y);
 console.log("#" + hex + " at x:" + mouse.x + " y:" + mouse.y);
 ```