Update README.md

Author: 淘小杰

README.md

@@ -16,7 +16,7 @@ add the code before your own code, must before or it won't work!!!
 ```js
 require('module-unique').init();
 ```
-here is a example code
+here is an example code
 ```
 #!/usr/bin/env node
 'use strict';
@@ -55,4 +55,4 @@ memory saved  about 30% above in my own project!
 ![http://gtms02.alicdn.com/tps/i2/TB1OBmVGFXXXXaZXXXXhN4IGpXX-930-98.png](http://gtms02.alicdn.com/tps/i2/TB1OBmVGFXXXXaZXXXXhN4IGpXX-930-98.png)
 
 #### after using module-unique
-![http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png](http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png)
+![http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png](http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png)