improved readme maybe

README.md

@@ -5,9 +5,10 @@ Abbr is a JavaScript library / function for finding, highlighting and annotating
 
 It needs no extra markup, all is done automatically. Just tell it what words you want to explain, and it'll do it.
 
-Abbr takes the following arguments:
+Abbr takes the following (default) arguments:
 
-    var opts = {
+```js
+{
 	// selector in which to search for abbreviations
 	where: 'body',
 	// abbreviation list - word: explanation
@@ -22,23 +23,28 @@ Abbr takes the following arguments:
 	excluded: ['script', 'style', 'code', 'head', 'textarea', 'embed'],
 	// Extra excluded (doesn't overwrite the original list)
 	exclude: []
-    };
+}
+```
 
 All config options are optional (though, obviously, you don't want to leave `words` empty).
 
 To run it, simply call:
 
-    abbr({
+```js
+abbr({
 	// Your options here
-    });
+});
+```
 
 For example:
 
-    abbr({
+```js
+abbr({
 	where: 'article',
 	words: {
 		'NSA': 'National Spying Agency',
 		'Putin': 'Bear rider'
 	}
-    });
+});
+```