Merge pull request #12801 from Carreau/wn-80

some updates on 8.0

docs/source/whatsnew/development.rst

@@ -22,6 +22,47 b' Need to be updated:'
 
    pr/*
 
+IPython 8.0 is bringing a number of new features and improvements to both the
+user of the terminal and of the kernel via Jupyter. The removal of compatibility
+with older version of Python is also the opportunity to do a couple of
+performance improvement in particular with respect to startup time.
+
+The main change in IPython 8.0 is the integration of the ``stack_data`` package;
+which provide smarter information in traceback; in particular it will highlight
+the AST node where an error occurs which can help to quickly narrow down errors.
+
+For example in the following snippet::
+
+    def foo(i):
+        x = [[[0]]]
+        return x[0][i][0]
+
+
+    def bar():
+        return foo(0) + foo(
+            1
+        ) + foo(2)
+
+
+Calling ``bar()`` would raise an ``IndexError`` on the return line of ``foo``,
+IPython 8.0 is capable of telling you, where the index error occurs::
+
+    return x[0][i][0]
+                ^
+
+To prepare for Python 3.10 we have also started working on removing reliance and
+any dependency that is not Python 3.10 compatible; that include migrating our
+test suite to Pytest, and starting to remove nose.
+
+We are also removing support for Python 3.6 allowing internal code to use more
+efficient ``pathlib``, and make better use of type annotations.
+
+The completer has also seen significant updates and make use of newer Jedi API
+offering faster and more reliable tab completion.
+
+For the terminal users this also enable the auto-suggestion feature, described
+below, which show "ghost text" ahead of your cursor you can accept without
+having to press the tab key or ask the completer to suggest completions.
 
 
 Autosuggestion is a very useful feature available in `fish <https://fishshell.com/>`__, `zsh <https://en.wikipedia.org/wiki/Z_shell>`__, and `prompt-toolkit <https://python-prompt-toolkit.readthedocs.io/en/master/pages/asking_for_input.html#auto-suggestion>`__.