Add 2 more test cases

Author: stayallive

tests/Logs/LogsAggregatorTest.php

@@ -63,5 +63,17 @@ public static function messageFormattingDataProvider(): \Generator
             ['value'],
             'Message with placeholders but incorrect number of values: %s, %s',
         ];
+
+        yield [
+            'Message with a percentage: 42%',
+            [],
+            'Message with a percentage: 42%',
+        ];
+
+        yield [
+            'Message with a percentage: 42%',
+            ['value'],
+            'Message with a percentage: 42%',
+        ];
     }
 }