[CLEANUP] Avoid magic method forwarding in RuleSet (#1159)

Part of #1147

Author: oliverklee

config/phpstan-baseline.neon

@@ -156,36 +156,6 @@ parameters:
 			count: 1
 			path: ../src/RuleSet/DeclarationBlock.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:removeLastSemicolon\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/RuleSet/RuleSet.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:safely\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/RuleSet/RuleSet.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:spaceAfterRules\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/RuleSet/RuleSet.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:spaceBeforeRules\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/RuleSet/RuleSet.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:spaceBetweenRules\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/RuleSet/RuleSet.php
-
 		-
 			message: '#^Only booleans are allowed in a negated boolean, string\|null given\.$#'
 			identifier: booleanNot.exprNotBoolean

src/RuleSet/RuleSet.php

@@ -278,27 +278,29 @@ protected function renderRules(OutputFormat $outputFormat)
         $isFirst = true;
         $nextLevelFormat = $outputFormat->nextLevel();
         foreach ($this->getRules() as $rule) {
-            $renderedRule = $nextLevelFormat->safely(static function () use ($rule, $nextLevelFormat): string {
+            $nextLevelFormatter = $nextLevelFormat->getFormatter();
+            $renderedRule = $nextLevelFormatter->safely(static function () use ($rule, $nextLevelFormat): string {
                 return $rule->render($nextLevelFormat);
             });
             if ($renderedRule === null) {
                 continue;
             }
             if ($isFirst) {
                 $isFirst = false;
-                $result .= $nextLevelFormat->spaceBeforeRules();
+                $result .= $nextLevelFormatter->spaceBeforeRules();
             } else {
-                $result .= $nextLevelFormat->spaceBetweenRules();
+                $result .= $nextLevelFormatter->spaceBetweenRules();
             }
             $result .= $renderedRule;
         }
 
+        $formatter = $outputFormat->getFormatter();
         if (!$isFirst) {
             // Had some output
-            $result .= $outputFormat->spaceAfterRules();
+            $result .= $formatter->spaceAfterRules();
         }
 
-        return $outputFormat->removeLastSemicolon($result);
+        return $formatter->removeLastSemicolon($result);
     }
 
     /**