Georg Brandl patched the doc changes in r86931.
Ray, for future reference, you might take a look, particularly 

-.. function:: makedirs(path[, mode][, exist_ok=False])
+.. function:: makedirs(path, mode=0o777, exist_ok=False)

In 3.x, (as opposed to 2.x), the style for params with default args is to give the default if possible, *without* [] now, so the signature in the doc looks as in a def statement. I, of course, missed this.