Load plurals from mo files properly

src/Symfony/Component/Translation/Loader/MoFileLoader.php

@@ -111,17 +111,12 @@ class MoFileLoader extends FileLoader
             $ids = ['singular' => $singularId, 'plural' => $pluralId];
             $item = compact('ids', 'translated');
 
-            if (\is_array($item['translated'])) {
-                $messages[$item['ids']['singular']] = stripcslashes($item['translated'][0]);
+            if (!empty($item['ids']['singular'])) {
+                $id = $item['ids']['singular'];
                 if (isset($item['ids']['plural'])) {
-                    $plurals = [];
-                    foreach ($item['translated'] as $plural => $translated) {
-                        $plurals[] = sprintf('{%d} %s', $plural, $translated);
-                    }
-                    $messages[$item['ids']['plural']] = stripcslashes(implode('|', $plurals));
+                    $id .= '|'.$item['ids']['plural'];
                 }
-            } elseif (!empty($item['ids']['singular'])) {
-                $messages[$item['ids']['singular']] = stripcslashes($item['translated']);
+                $messages[$id] = stripcslashes(implode('|', (array) $item['translated']));
             }
         }
 

src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php

@@ -34,7 +34,10 @@ class MoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/plurals.mo';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(['foo' => 'bar', 'foos' => '{0} bar|{1} bars'], $catalogue->all('domain1'));
+        $this->assertEquals([
+            'foo|foos' => 'bar|bars',
+            '{0} no foos|one foo|%count% foos' => '{0} no bars|one bar|%count% bars',
+        ], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
         $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }