Merge branch '3.4' into 4.2

* 3.4:
  [FrameworkBundle] minor: fix typo in SessionTest
  [Debug] workaround BC break in PHP 7.3

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SessionTest.php

@@ -71,7 +71,7 @@ class SessionTest extends WebTestCase
 
     /**
      * See if two separate insulated clients can run without
-     * polluting eachother's session data.
+     * polluting each other's session data.
      *
      * @dataProvider getConfigs
      */

src/Symfony/Component/Debug/ErrorHandler.php

@@ -380,6 +380,11 @@ class ErrorHandler
      */
     public function handleError($type, $message, $file, $line)
     {
+        // @deprecated to be removed in Symfony 5.0
+        if (\PHP_VERSION_ID >= 70300 && $message && '"' === $message[0] && 0 === strpos($message, '"continue') && preg_match('/^"continue(?: \d++)?" targeting switch is equivalent to "break(?: \d++)?"\. Did you mean to use "continue(?: \d++)?"\?$/', $message)) {
+            $type = E_DEPRECATED;
+        }
+
         // Level is the current error reporting level to manage silent error.
         $level = error_reporting();
         $silenced = 0 === ($level & $type);