[Transation] Fix grammar.

In English, zero is plural so need to use 'are' - "there are no apples".
English's pluralisation rule is: nplurals=2; plural=n != 1;

src/Symfony/Component/Translation/MessageSelector.php

@@ -28,7 +28,7 @@ class MessageSelector
      *
      * The message supports two different types of pluralization rules:
      *
-     * interval: {0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples
+     * interval: {0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples
      * indexed:  There is one apple|There is %count% apples
      *
      * The indexed solution can also contain labels (e.g. one: There is one apple).
@@ -36,7 +36,7 @@ class MessageSelector
      * affect the functionality.
      *
      * The two methods can also be mixed:
-     *     {0} There is no apples|one: There is one apple|more: There is %count% apples
+     *     {0} There are no apples|one: There is one apple|more: There are %count% apples
      *
      * @throws InvalidArgumentException
      * @param  string $message The message being translated