TMP: exercise mutation testing (drop before merge)

Author: ondrejmirtes

src/Type/IntersectionType.php

@@ -269,7 +269,7 @@ public function accepts(Type $otherType, bool $strictTypes): AcceptsResult
 			$isList = $otherType->isList();
 			$reasons = $result->reasons;
 			$verbosity = VerbosityLevel::getRecommendedLevelByType($this, $otherType);
-			if ($this->isList()->yes() && !$isList->yes()) {
+			if (($this->isList()->yes()) && !$isList->yes()) {
 				$reasons[] = sprintf(
 					'%s %s a list.',
 					$otherType->describe($verbosity),
@@ -278,7 +278,7 @@ public function accepts(Type $otherType, bool $strictTypes): AcceptsResult
 			}
 
 			$isNonEmpty = $otherType->isIterableAtLeastOnce();
-			if ($this->isIterableAtLeastOnce()->yes() && !$isNonEmpty->yes()) {
+			if (($this->isIterableAtLeastOnce()->yes()) && !$isNonEmpty->yes()) {
 				$reasons[] = sprintf(
 					'%s %s empty.',
 					$otherType->describe($verbosity),