Issue #15482: Merge 78449:3fe01f7520e2 with a minor clarification.

diff --cc Doc/library/functions.rst
index 3f56621360ea891dbb0c3d19f3ba516561d5e45c,5d6a5fed0aa74125a5ea3f188062060aecbaa881..e7ee51b330f26c242f908635c299c756d29cc7fb
--- 1/Doc/library/functions.rst
--- 2/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@@ -1506,9 -1474,6 +1506,10 @@@ are always available.  They are listed 
     If you simply want to import a module (potentially within a package) by name,
     use :func:`importlib.import_module`.
  
-       Negative values for *level* are no longer supported.
 +   .. versionchanged:: 3.3
++      Negative values for *level* are no longer supported (which also changes
++      the default value to 0).
 +
  
  .. rubric:: Footnotes