Fix token serialization with invalid characters

Author: gapple

src/Serializer.php

@@ -134,7 +134,7 @@ private static function serializeToken(Token $value): string
         // @see https://tools.ietf.org/html/rfc7230#section-3.2.6
         $tchar = preg_quote("!#$%&'*+-.^_`|~");
 
-        if (!preg_match('/^((?:\*|[a-z])[a-z0-9:\/' . $tchar . ']*)/i', $value)) {
+        if (!preg_match('/^((?:\*|[a-z])[a-z0-9:\/' . $tchar . ']*)$/i', $value)) {
             throw new SerializeException('Invalid characters in token');
         }
 

tests/RulesetSerializationTokenGeneratedTest.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace gapple\Tests\StructuredHeaders;
+
+class RulesetSerializationTokenGeneratedTest extends RulesetTest
+{
+    protected $ruleset = 'serialisation-tests/token-generated';
+}