Remove many "versionchanged" items that didn't use the official markup,
but just some text embedded in the docs.
Also remove paragraph about implicit relative imports from tutorial.
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index f66899c..0929f0e 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -152,21 +152,18 @@
.. warning::
- Assigning the *traceback* return value to a local variable in a function that is
- handling an exception will cause a circular reference. This will prevent
- anything referenced by a local variable in the same function or by the traceback
- from being garbage collected. Since most functions don't need access to the
- traceback, the best solution is to use something like ``exctype, value =
- sys.exc_info()[:2]`` to extract only the exception type and value. If you do
- need the traceback, make sure to delete it after use (best done with a
- :keyword:`try` ... :keyword:`finally` statement) or to call :func:`exc_info` in
- a function that does not itself handle an exception.
+ Assigning the *traceback* return value to a local variable in a function
+ that is handling an exception will cause a circular reference. Since most
+ functions don't need access to the traceback, the best solution is to use
+ something like ``exctype, value = sys.exc_info()[:2]`` to extract only the
+ exception type and value. If you do need the traceback, make sure to
+ delete it after use (best done with a :keyword:`try`
+ ... :keyword:`finally` statement) or to call :func:`exc_info` in a
+ function that does not itself handle an exception.
- .. note::
-
- Beginning with Python 2.2, such cycles are automatically reclaimed when garbage
- collection is enabled and they become unreachable, but it remains more efficient
- to avoid creating cycles.
+ Such cycles are normally automatically reclaimed when garbage collection
+ is enabled and they become unreachable, but it remains more efficient to
+ avoid creating cycles.
.. data:: exec_prefix