Return node when node mutated in place, so change is recorded

rules/DowngradePhp80/Rector/ClassMethod/DowngradeTrailingCommasInParamUseRector.php

@@ -86,11 +86,17 @@ public function getNodeTypes(): array
      */
     public function refactor(Node $node): ?Node
     {
-        if ($node instanceof Closure) {
-            $this->processUses($node);
+        $hasChanged = false;
+
+        if ($node instanceof Closure && $this->processUses($node) instanceof Node) {
+            $hasChanged = true;
+        }
+
+        if ($this->processParams($node) instanceof Node) {
+            $hasChanged = true;
         }
 
-        return $this->processParams($node);
+        return $hasChanged ? $node : null;
     }
 
     private function processUses(Closure $node): ?Node

rules/DowngradePhp80/Rector/New_/DowngradeArbitraryExpressionsSupportRector.php

@@ -128,6 +128,8 @@ private function isBetweenParentheses(Node $node): bool
      */
     private function refactorAssign(array $assigns, Expression $expression): array|null
     {
+        $hasChanged = false;
+
         foreach ($assigns as $assign) {
             if (! $assign->expr instanceof New_ && ! $assign->expr instanceof Instanceof_) {
                 continue;
@@ -145,6 +147,7 @@ private function refactorAssign(array $assigns, Expression $expression): array|n
 
             // mandatory to remove parentheses
             $newOrInstanceof->setAttribute(AttributeKey::ORIGINAL_NODE, null);
+            $hasChanged = true;
 
             if ($isAllowed) {
                 continue;
@@ -164,7 +167,8 @@ private function refactorAssign(array $assigns, Expression $expression): array|n
             return [new Expression($exprAssign), $expression];
         }
 
-        return null;
+        // parentheses were removed in place, report the change so it gets printed
+        return $hasChanged ? [$expression] : null;
     }
 
     /**