Fix grammar. Props @edent. Fixes #44.

Author: Viper007Bond

readme.txt

@@ -10,7 +10,7 @@ Easily post syntax-highlighted code to your site without having to modify the co
 
 == Description ==
 
-SyntaxHighlighter Evolved allows you to easily post syntax-highlighted code to your site without losing it's formatting or making any manual changes. It uses the [SyntaxHighlighter JavaScript package by Alex Gorbatchev](http://alexgorbatchev.com/wiki/SyntaxHighlighter).
+SyntaxHighlighter Evolved allows you to easily post syntax-highlighted code to your site without losing its formatting or making any manual changes. It uses the [SyntaxHighlighter JavaScript package by Alex Gorbatchev](http://alexgorbatchev.com/wiki/SyntaxHighlighter).
 
 For a live demo, see [this plugin's homepage](http://www.viper007bond.com/wordpress-plugins/syntaxhighlighter/).