Merge branch '3.4' into 4.3

* 3.4:
  [Yaml] Implement multiline string as scalar block for tagged values
  [HttpFoundation] Use `Cache-Control: must-revalidate` only if explicit lifetime has been given
  [FrameworkBundle] Use UserInterface to @return in getUser method
  [CI] Replace php7.4snapshot with php7.4 in Travis configuration
  [ExpressionLanguage][Node][BinaryNode] Process division by zero
  forward caught exception
  [Validator][ConstraintValidator] Stop passing unnecessary timezone argument to \DateTime
  add tags before processing them
  [MonologBridge] Fix debug processor datetime type

Author: nicolas-grekas

ConstraintValidator.php

@@ -93,10 +93,7 @@ protected function formatValue($value, $format = 0)
                 // neither the native nor the stub IntlDateFormatter support
                 // DateTimeImmutable as of yet
                 if (!$value instanceof \DateTime) {
-                    $value = new \DateTime(
-                        $value->format('Y-m-d H:i:s.u e'),
-                        $value->getTimezone()
-                    );
+                    $value = new \DateTime($value->format('Y-m-d H:i:s.u e'));
                 }
 
                 return $formatter->format($value);

Tests/Constraints/AbstractComparisonValidatorTestCase.php

@@ -53,10 +53,7 @@ protected static function addPhp5Dot5Comparisons(array $comparisons)
 
             foreach ($comparison as $i => $value) {
                 if ($value instanceof \DateTime) {
-                    $comparison[$i] = new \DateTimeImmutable(
-                        $value->format('Y-m-d H:i:s.u e'),
-                        $value->getTimezone()
-                    );
+                    $comparison[$i] = new \DateTimeImmutable($value->format('Y-m-d H:i:s.u e'));
                     $add = true;
                 } elseif ('DateTime' === $value) {
                     $comparison[$i] = 'DateTimeImmutable';