Merge branch '3.x' into 4.x

* 3.x:
  Fix wrong rounding_mode values
  #4677: Add use statements for classes referenced in the getOperators @psalm-return doc
  Update LeagueMarkdown.php

Author: fabpot

doc/filters/format_number.rst

@@ -60,9 +60,9 @@ The list of supported options:
     * ``floor``: Floor rounding
     * ``down``: Rounding towards zero
     * ``up``: Rounding away from zero
-    * ``half_even``: Round halves to the nearest even integer
-    * ``half_up``: Round halves up
-    * ``half_down``: Round halves down
+    * ``halfeven``: Round halves to the nearest even integer
+    * ``halfup``: Round halves up
+    * ``halfdown``: Round halves down
 
     .. code-block:: twig
 

extra/markdown-extra/LeagueMarkdown.php

@@ -12,13 +12,14 @@
 namespace Twig\Extra\Markdown;
 
 use League\CommonMark\CommonMarkConverter;
+use League\CommonMark\MarkdownConverter;
 
 class LeagueMarkdown implements MarkdownInterface
 {
     private $converter;
     private $legacySupport;
 
-    public function __construct(?CommonMarkConverter $converter = null)
+    public function __construct(?MarkdownConverter $converter = null)
     {
         $this->converter = $converter ?: new CommonMarkConverter();
         $this->legacySupport = !method_exists($this->converter, 'convert');