By looking at x.py, I confirmed that the added stars are correct.
Also, the correction of 'header' to 'hdr' is correct.
However, for threading.py in 3.3.0, I see
class Thread:
...
def __init__(self, group=None, target=None, name=None,
args=(), kwargs=None, *, daemon=None):
whereas the patch and existing .rst
-.. class:: Thread(group=None, target=None, name=None, args=(), kwargs={},
+.. class:: Thread(group=None, target=None, name=None, args=(), kwargs={}, \
verbose=None, *, daemon=None)
has an extra 'verbose=None' that should be removed there and in any explanatory text that follows.
(The fact that we found 2 doc signature errors other than the 4 missing *s suggests that we need a tool to systematically compare doc signature to code signature.)