Merge pull request #13336 from meeseeksmachine/auto-backport-of-pr-13…

…334-on-7.x

Backport PR #13334 on branch 7.x (Fix race condition in paths.get_ipython_dirs())

IPython/paths.py

@@ -67,7 +67,7 @@ def get_ipython_dir() -> str:
                     " using a temp directory.".format(parent))
             ipdir = tempfile.mkdtemp()
         else:
-            os.makedirs(ipdir)
+            os.makedirs(ipdir, exist_ok=True)
     assert isinstance(ipdir, str), "all path manipulation should be str(unicode), but are not."
     return ipdir