FileExistsError is raised by mkdir when dir exists
Reported by Saul Spatz on docs@
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index f2cfdb4..0ff6857 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1624,8 +1624,8 @@
Create a directory named *path* with numeric mode *mode*.
On some systems, *mode* is ignored. Where it is used, the current umask
- value is first masked out. If the directory already exists, :exc:`OSError`
- is raised.
+ value is first masked out. If the directory already exists,
+ :exc:`FileExistsError` is raised.
This function can also support :ref:`paths relative to directory descriptors
<dir_fd>`.