[CLEANUP] Avoid magic method forwarding in Document (#1155)

Part of #1147

Author: oliverklee

config/phpstan-baseline.neon

@@ -36,12 +36,6 @@ parameters:
 			count: 1
 			path: ../src/CSSList/CSSList.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:comments\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/CSSList/Document.php
-
 		-
 			message: '#^Parameters should have "string\|null" types as the only types passed to this method$#'
 			identifier: typePerfect.narrowPublicClassMethodParamType

src/CSSList/Document.php

@@ -86,7 +86,7 @@ public function render(?OutputFormat $outputFormat = null): string
         if ($outputFormat === null) {
             $outputFormat = new OutputFormat();
         }
-        return $outputFormat->comments($this) . $this->renderListContents($outputFormat);
+        return $outputFormat->getFormatter()->comments($this) . $this->renderListContents($outputFormat);
     }
 
     public function isRootList(): bool