Merge branch '4.2' into 4.3

* 4.2:
  fixed CS
  fixed CS
  [HttpKernel] Remove TestEventDispatcher.

Author: fabpot

TranslatorTrait.php

@@ -91,7 +91,7 @@ public function trans($id, array $parameters = [], $domain = null, $locale = nul
                     }
                 } else {
                     $leftNumber = '-Inf' === $matches['left'] ? -INF : (float) $matches['left'];
-                    $rightNumber = \is_numeric($matches['right']) ? (float) $matches['right'] : INF;
+                    $rightNumber = is_numeric($matches['right']) ? (float) $matches['right'] : INF;
 
                     if (('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber)
                         && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber)
@@ -117,7 +117,7 @@ public function trans($id, array $parameters = [], $domain = null, $locale = nul
 
             $message = sprintf('Unable to choose a translation for "%s" with locale "%s" for value "%d". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").', $id, $locale, $number);
 
-            if (\class_exists(InvalidArgumentException::class)) {
+            if (class_exists(InvalidArgumentException::class)) {
                 throw new InvalidArgumentException($message);
             }