Fix documentation typo: wprite() -> write().

Doc/library/os.rst

@@ -723,7 +723,7 @@ as internal buffering of data.
 
       This function is intended for low-level I/O.  For normal usage, use the
       built-in function :func:`open`, which returns a "file object" with
-      :meth:`~file.read` and :meth:`~file.wprite` methods (and many more).  To
+      :meth:`~file.read` and :meth:`~file.write` methods (and many more).  To
       wrap a file descriptor in a "file object", use :func:`fdopen`.