merged branch jaugustin/patch-1 (PR #4410)

Commits
-------

09e5f46 fix markdown for code

Discussion
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fix markdown for code in  UPGRADE-2.1.md

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by travisbot at 2012-05-25T12:20:04Z

This pull request [passes](http://travis-ci.org/symfony/symfony/builds/1432391) (merged 09e5f462 into 023dbf80).

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by jaugustin at 2012-05-25T12:22:13Z

great I didn't break anything :D

UPGRADE-2.1.md

@@ -696,21 +696,25 @@
 
     Before:
 
+    ```
     public function guessMinLength($class, $property)
     {
         if (/* condition */) {
             return new ValueGuess($minLength, Guess::LOW_CONFIDENCE);
         }
     }
+    ```
 
     After:
 
+    ```
     public function guessPattern($class, $property)
     {
         if (/* condition */) {
             return new ValueGuess('.{' . $minLength . ',}', Guess::LOW_CONFIDENCE);
         }
     }
+    ```
 
   * Setting the option "property_path" to `false` was deprecated and will be unsupported
     as of Symfony 2.3.