minor #3605 Fixed a plural issue (benjaminpaap)

This PR was merged into the 2.3 branch.

Discussion
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Fixed a plural issue

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
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1fa4fee Fixed a plural issue

Author: weaverryan

book/translation.rst

@@ -321,7 +321,7 @@ The translator service is accessible in PHP templates through the
     <?php echo $view['translator']->trans('Symfony2 is great') ?>
 
     <?php echo $view['translator']->transChoice(
-        '{0} There is no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
+        '{0} There are no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
         10,
         array('%count%' => 10)
     ) ?>