Minor tweaks

Author: kevva

readme.md

@@ -2,12 +2,14 @@
 
 > Regular expression for matching credit card numbers
 
+
 ## Install
 
-```sh
+```
 $ npm install --save credit-card-regex
 ```
 
+
 ## Usage
 
 ```js
@@ -26,6 +28,22 @@ creditCardRegex({exact: true}).test('6011881485017922');
 //=> ['6011881485017922', '5441068611005540']
 ```
 
+
+## API
+
+### creditCardRegex(options)
+
+Returns a regex for matching credit card numbers.
+
+#### options.exact
+
+Type: `boolean`  
+Default: `false` *(Matches any credit card number in a string)*
+
+Only match an exact string.  
+Useful with `RegExp#test` to check if a string is a credit card number.
+
+
 ## License
 
 MIT © [Kevin Mårtensson](https://github.com/kevva)

test/test.js

@@ -1,7 +1,7 @@
 'use strict';
 
-var creditCardRegex = require('../');
 var test = require('ava');
+var creditCardRegex = require('../');
 
 test('match credit card numbers', function (t) {
 	var fixtures = [].concat(