Changes suggested in code review

Author: oliverklee

src/RuleSet/RuleSet.php

@@ -103,15 +103,15 @@ public function getLineNo(): int
 
     public function addRule(Rule $ruleToAdd, ?Rule $sibling = null): void
     {
-        $rule = $ruleToAdd->getRule();
-        if (!isset($this->rules[$rule])) {
-            $this->rules[$rule] = [];
+        $propertyName = $ruleToAdd->getRule();
+        if (!isset($this->rules[$propertyName])) {
+            $this->rules[$propertyName] = [];
         }
 
-        $position = \count($this->rules[$rule]);
+        $position = \count($this->rules[$propertyName]);
 
         if ($sibling !== null) {
-            $siblingPosition = \array_search($sibling, $this->rules[$rule], true);
+            $siblingPosition = \array_search($sibling, $this->rules[$propertyName], true);
             if ($siblingPosition !== false) {
                 $position = $siblingPosition;
                 $ruleToAdd->setPosition($sibling->getLineNo(), $sibling->getColNo() - 1);
@@ -127,7 +127,7 @@ public function addRule(Rule $ruleToAdd, ?Rule $sibling = null): void
             }
         }
 
-        \array_splice($this->rules[$rule], $position, 0, [$ruleToAdd]);
+        \array_splice($this->rules[$propertyName], $position, 0, [$ruleToAdd]);
     }
 
     /**