fix: logs must be a string

run.py

@@ -207,20 +207,20 @@ if __name__ == "__main__":
 
     print("Summary:\n")
 
-    logs = []
+    logs = ""
 
     if success:
         print(f"Successful tests:\n")
         for s in success:
-            log = f"[OK] {s}"
+            log = f"[OK] {s}\n"
             print(log)
-            logs.append(log)
+            logs += log
 
     if failures:
         print(f"\n\nFailed tests:\n")
         for _, (test, error) in enumerate(failures.items()):
             log = f"[FAIL] {test} failed with error:\n{error}\n-----\n"
             print(log)
-            logs.append(log)
+            logs += log
 
     upload_logs_to_ftest(len(failures) == 0, logs)