Backport PR #6514: Fix for copying metadata flags

Only became apparent when tests ran on a BSD based system.

IPython/utils/io.py

@@ -230,7 +230,7 b' def _copy_metadata(src, dst):'
     shutil.copymode(src, dst)
     st = os.stat(src)
     if hasattr(os, 'chflags') and hasattr(st, 'st_flags'):
-        os.chflags(st.st_flags)
+        os.chflags(dst, st.st_flags)
 
 @contextmanager
 def atomic_writing(path, text=True, encoding='utf-8', **kwargs):