Fixing bug in documentation

Signed-off-by: RJ Garcia <rj@bighead.net>

README.md

@@ -10,16 +10,16 @@ The Mw library is a very flexible framework for converting middleware into handl
 use Krak\Mw;
 
 $handler = mw\compose([
-    function($a, $next) {
-        return strtoupper($a);
+    function($s, $next) {
+        return strtoupper($s);
     },
-    function($a, $next) {
-        return $next('x' . $a . 'x');
+    function($s, $next) {
+        return 'x' . $next($s . 'x');
     }
 ]);
 
 $res = $handler('abc');
-// $res == 'xABCx'
+assert($res == 'xABCX');
 ```
 
 ![](docs/_static/middleware.png)

docs/index.rst

@@ -17,16 +17,16 @@ Middleware provide a great system for extendable features and the Krak\\Mw libra
     use Krak\Mw;
 
     $handler = mw\compose([
-        function($a, $next) {
-            return strtoupper($a);
+        function($s, $next) {
+            return strtoupper($s);
         },
-        function($a, $next) {
-            return $next('x' . $a . 'x');
+        function($s, $next) {
+            return 'x' . $next($s . 'x');
         }
     ]);
 
     $res = $handler('abc');
-    // $res == 'xABCx'
+    assert($res == 'xABCX');
 
 .. image:: _static/middleware.png
 

example/readme.php

@@ -0,0 +1,17 @@
+<?php
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use Krak\Mw;
+
+$handler = mw\compose([
+    function($s, $next) {
+        return strtoupper($s);
+    },
+    function($s, $next) {
+        return 'x' . $next($s . 'x');
+    }
+]);
+
+$res = $handler('abc');
+assert($res == 'xABCX');