Flush stdout buffer before print to stderr

scripts/check-urls.py

@@ -203,7 +203,8 @@ def url_checker(num_workers=8):
                 (url, filename) = item
                 workers[i] = create_new_task(url, filename)
         time.sleep(0.2)
-    print("Worker finished")
+    # Flush stdout buffer before print to stderr
+    print("Worker finished", flush=True)
 
 
 def main(files):
@@ -218,7 +219,9 @@ def main(files):
     checker.join()
 
     for url, files in BROKEN_URLS.items():
-        print("BROKEN URL: '%s' in files: %s" % (url, ", ".join(files)), file=sys.stderr)
+        message = "BROKEN URL: '%s' in files: %s" % (url, ", ".join(files))
+        print(message, file=sys.stdout)
+        print(message, file=sys.stderr, flush=True)
     if BROKEN_URLS:
         exit(1)