ignore some traitlets types

more types

Extend the shim pickleshare library and fix the store magic to use .get (#14321) This should make it more obvious what is happening. Closes #14235

Misc typing and code cleanup. (#14324)

Some minimal typing and removal of allow-none

Extend the shim pickleshare library and fix the store magic to use .get This should make it more obvious what is happening.

fix types in utils/text.py

IPython/core/history.py: Handle RuntimeError on Thread.start (#14318) On the emscripten (Pyodide), `HistorySavingThread.start` raises `RuntimeError`. We handle this exception here. It also reveals a misplaced `atexit` call, which we also fix here.

.github/workflows/downstream.yml: Test with sagemath-repl (#14317) Adding a lightweight test with SageMath using the modularized distribution https://pypi.org/project/sagemath-repl/ of the Sage library. Motivated by https://github.com/sagemath/sage/issues/36975, https://github.com/ipython/ipython/pull/14223#issuecomment-1870467577, https://github.com/sagemath/sage/issues/36993, https://github.com/sagemath/sage/issues/37031 @Carreau

IPython/core/history.py (HistorySavingThread.run): Use atexit.unregister on termination