Merge branch '2.7' into 2.8

* 2.7:
  fixed YAML files missing quotes when a string starts with @
  [VarDumper] Fix anonymous class dumping
  [Routing] mark internal classes
  [Translation][Csv file] remove unnecessary statements, for better readability.
  [Form] remove validation of FormRegistry::getType as FormRegistry::hasType does not validate either

Author: fabpot

Loader/CsvFileLoader.php

@@ -41,18 +41,8 @@ protected function loadResource($resource)
         $file->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
 
         foreach ($file as $data) {
-            if (substr($data[0], 0, 1) === '#') {
-                continue;
-            }
-
-            if (!isset($data[1])) {
-                continue;
-            }
-
-            if (count($data) == 2) {
+            if ('#' !== substr($data[0], 0, 1) && isset($data[1]) && 2 === count($data)) {
                 $messages[$data[0]] = $data[1];
-            } else {
-                continue;
             }
         }