docs: update whatsnew 9.11 with all post-merge PRs by Copilot · Pull Request #15147 · ipython/ipython

Copilot · 2026-02-26T12:40:07Z

The IPython 9.10 whatsnew section only covered 3 PRs from the initial write-up; 8 more were merged into the milestone afterward without documentation.

Changes to `docs/source/whatsnew/version9.rst`

Intro: Updated release summary to reflect the full scope of changes
PR list: Added Add system_raise_on_error config option for ! shell operator #15073, start droping 3.11 #15121, Fix encoding to utf8 for autoreload #15122, more types #15126, stricter conf + add typing to IPython/core/magic.py #15130, Inline and remove only usage of on_off #15133, Add type annotations to _process_common.py and _process_win32.py #15134, Have a static banner when setting SOURCE_DATE_EPOCH #15144
New narrative sections:
- system_raise_on_error — new Bool traitlet (default False) that raises CalledProcessError when ! shell commands exit non-zero
- Reproducible banner — static banner output when SOURCE_DATE_EPOCH is set
- Python 3.11 deprecation — beginning of support removal
- Autoreload encoding — explicit UTF-8 encoding to avoid platform-default issues
- Type annotation improvements — covers magic.py, _process_common.py, _process_win32.py, and misc across the codebase

Original prompt

Update docs/source/whatsnew/version9.rst for IPython 9.10

The IPython 9.10 section in docs/source/whatsnew/version9.rst was written when PR #15120 ("what's new in 9.10") was merged on 2026-02-02. Several more PRs have since been merged into the 9.10 milestone and need to be documented.

Current state

The current 9.10 section (lines 6–35 of version9.rst) lists only 3 PRs and a brief narrative:
.. _version 9.10:

IPython 9.10
============

This release includes improvements to history management during forking and formatting fixes.

- :ghpull:`15110` Fix Removing leading indentation when stripping prompt
- :ghpull:`15115` Stop HistorySavingThread before fork
- :ghpull:`15118` Add debug info for autoreload


History Thread Management Improvements
---------------------------------------

The `HistorySavingThread` is now properly stopped before process forking,
preventing threading issues in child processes. This ensures that history
operations work correctly when IPython is used in applications that perform
process forking.


Thanks
------

Thanks as well to the `D. E. Shaw group <https://deshaw.com/>`_ for sponsoring
work on IPython.

As usual, you can find the full list of PRs on GitHub under `the 9.10
<https://github.com/ipython/ipython/milestone/159?closed=1>`__ milestone.
What needs to be added

The following PRs were merged into the 9.10 milestone after the whatsnew was written and must be documented:

Add system_raise_on_error config option for ! shell operator #15073 – Add system_raise_on_error config option for ! shell operator (by @adityawasudeo). Adds a new system_raise_on_error Bool traitlet config (default: False) that raises CalledProcessError when shell commands executed via the ! operator return a non-zero exit status. Modifies system_piped(), system_raw(), and getoutput().

start droping 3.11 #15121 – Start dropping Python 3.11 (by @Carreau). Begin deprecation/removal of Python 3.11 support.

Fix encoding to utf8 for autoreload #15122 – Fix encoding to utf8 for autoreload (by @amirebrahimi). Sets UTF-8 as the default encoding for autoreload since this won't come for all platforms until Python 3.15.

more types #15126 – More types (by @Carreau). Additional type annotations throughout the codebase.

stricter conf + add typing to IPython/core/magic.py #15130 – Stricter conf + add typing to IPython/core/magic.py (by @Carreau).

Inline and remove only usage of on_off #15133 – Inline and remove only usage of on_off (by @Carreau). Closes inline and deprecate the on_off util function. #15129.

Add type annotations to _process_common.py and _process_win32.py #15134 – Add type annotations to _process_common.py and _process_win32.py (by @Carreau). Renames first arg of arg_split to commandline for consistency.

Have a static banner when setting SOURCE_DATE_EPOCH #15144 – Have a static banner when setting SOURCE_DATE_EPOCH (by @Carreau). Makes the IPython banner reproducible/static when SOURCE_DATE_EPOCH is set (helps with reproducible builds; related to Visual documentation tests should not pin IPython version jupyterlab/jupyterlab#18552).

What to do

Update the IPython 9.10 section in docs/source/whatsnew/version9.rst (BlobSha: 879e381ee97b296c4383b4b4f09021df99f8d6f7) to:

Add all the new PRs to the bullet list at the top of the 9.10 section.

Add appropriate narrative sections describing the notable new features/changes:

system_raise_on_error option – new config to raise on non-zero exit from ! shell operator.

Reproducible banner – static banner when SOURCE_DATE_EPOCH is set.

Python 3.11 deprecation – starting to drop Python 3.11.

Autoreload encoding fix – UTF-8 encoding default for autoreload.

Type annotation improvements – various typing improvements across the codebase (PRs more types #15126, stricter conf + add typing to IPython/core/magic.py #15130, Add type annotations to _process_common.py and _process_win32.py #15134).

Update the introductory description of the release to reflect the fuller picture.

Keep the milestone link at the bottom: https://github.com/ipython/ipython/milestone/159?closed=1

Please follow the same RST style and formatting conventions as the rest of version9.rst. The PR bullet entries should use the :ghpull: role, e.g. :ghpull:\15073``.

The file to update is docs/source/whatsnew/version9.rst.

This pull request was created from Copilot chat.

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

…sections Co-authored-by: Carreau <335567+Carreau@users.noreply.github.com>

Initial plan

87cc044

Copilot AI assigned Copilot and Carreau Feb 26, 2026

Copilot started work on behalf of Carreau February 26, 2026 12:40 View session

Update version9.rst: document all IPython 9.10 PRs and add narrative …

46589c7

…sections Co-authored-by: Carreau <335567+Carreau@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Update IPython 9.10 section in whatsnew document~~ docs: update whatsnew 9.10 with all post-merge PRs Feb 26, 2026

Copilot finished work on behalf of Carreau February 26, 2026 12:43

Carreau modified the milestones: 9.10, 9.11 Mar 4, 2026

Carreau changed the title ~~docs: update whatsnew 9.10 with all post-merge PRs~~ docs: update whatsnew 9.11 with all post-merge PRs Mar 4, 2026

redo by hand

991b74e

Carreau marked this pull request as ready for review March 4, 2026 09:47

Carreau merged commit 2de974e into main Mar 4, 2026
19 checks passed

Carreau deleted the copilot/update-whatsnew-ipython-9-10 branch March 4, 2026 10:01

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docs: update whatsnew 9.11 with all post-merge PRs#15147

docs: update whatsnew 9.11 with all post-merge PRs#15147
Carreau merged 3 commits intomainfrom
copilot/update-whatsnew-ipython-9-10

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Changes to docs/source/whatsnew/version9.rst

Update docs/source/whatsnew/version9.rst for IPython 9.10

Current state

What needs to be added

What to do

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Changes to `docs/source/whatsnew/version9.rst`

Update `docs/source/whatsnew/version9.rst` for IPython 9.10