Штуки

src/LiquidCode.Tester.Worker/Services/OutputCheckerService.cs

@@ -51,6 +51,12 @@ public class OutputCheckerService : IOutputCheckerService
             lines.RemoveAt(lines.Count - 1);
         }
 
+        // Remove leading empty lines
+        while (lines.Count > 0 && string.IsNullOrWhiteSpace(lines[0]))
+        {
+            lines.RemoveAt(0);
+        }
+
         return string.Join("\n", lines);
     }