bug #18839 People - person singularization (Keeo)

This PR was submitted for the 2.8 branch but it was merged into the 2.3 branch instead (closes #18839).

Discussion
----------

People - person singularization

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Bugfix for version 2.8 - more information [#18824]

Commits
-------

02070f9 People - person singularization

src/Symfony/Component/PropertyAccess/StringUtil.php

@@ -124,6 +124,9 @@ class StringUtil
 
         // chateaux (chateau)
         array('xuae', 4, false, true, 'eau'),
+
+        // people (person)
+        array('elpoep', 6, true, true, 'person'),
     );
 
     /**

src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php

@@ -107,6 +107,8 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase
             array('objectives', 'objective'),
             array('oxen', 'ox'),
             array('parties', 'party'),
+            array('people', 'person'),
+            array('persons', 'person'),
             array('phenomena', array('phenomenon', 'phenomenum')),
             array('photos', 'photo'),
             array('pianos', 'piano'),