Merge branch '5.1' into 5.2

* 5.1:
  [HttpFoundation] Make test pass without Xdebug.
  [Mime] Leverage PHP 8's detection of CSV files.
  [HttpFoundation] Make sure we reuse the current PHP binary for the webserver process in functional tests.
  [FrameworkBundle] TextDescriptor::formatControllerLink checked method…
  Fix CS
  [HttpClient] throw clearer error when no scheme is provided
  Fix github pr template and include 5.2 for bugfixes
  [HttpFoundation] Ignore stack trace printed by Xdebug 3.
  fix lexing backslashes in single quoted strings

Author: derrabus

Console/Descriptor/TextDescriptor.php

@@ -535,7 +535,9 @@ private function formatControllerLink($controller, string $anchorText, callable
         }
 
         try {
-            if (\is_array($controller)) {
+            if (null === $controller) {
+                return $anchorText;
+            } elseif (\is_array($controller)) {
                 $r = new \ReflectionMethod($controller[0], $controller[1]);
             } elseif ($controller instanceof \Closure) {
                 $r = new \ReflectionFunction($controller);