Enable os.fsync() for Windows, mapping it to MS's _commit() there. The
docs here are best-guess: the MS docs I could find weren't clear, and
some even claimed _commit() has no effect on Win32 systems (which is
easily shown to be false just by trying it).
diff --git a/Misc/NEWS b/Misc/NEWS
index 330831d..496ad0b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -232,6 +232,9 @@
Windows
-------
+- os.fsync() now exists on Windows, and calls the Microsoft _commit()
+ function.
+
- New function winsound.MessageBeep() wraps the Win32 API
MessageBeep().