fix(cli): use mp.suspend for pixi_progress::println!

[lucascolley]

Description

This PR fixes newline printing for some situations in the CLI.

Before (spaces):

✨ Pixi task (build in build): spin build --setup-args=-Dblas=blas --setup-args=-Dlapack=lapack --setup-args=-Duse-g77-abi=true: (Build SciPy (default settings))
$ meson compile -j 8 -C build
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /Users/lucascolley/ghq/github.com/scipy/scipy/.pixi/envs/build/bin/ninja -C /Users/lucascolley/ghq/github.com/scipy/scipy/build -j 8
ninja: Entering directory `/Users/lucascolley/ghq/github.com/scipy/scipy/build'
[2/356] Generating subprojects/highs/highs/HConfig.h with a custom command
$ meson install --only-changed -C build --destdir ../build-install --tags=runtime,python-runtime,tests,devel --skip-subprojects
                                                                                                                             ✨ Pixi task (ipython in ipython): spin ipython --no-build: (Launch IPython)                                                 $ export PYTHONPATH="/Users/lucascolley/ghq/github.com/scipy/scipy/build-install/usr/lib/python3.14/site-packages"
💻 Launching IPython with PYTHONPATH="/Users/lucascolley/ghq/github.com/scipy/scipy/build-install/usr/lib/python3.14/site-packages"

After (newlines):

✨ Pixi task (build in build): spin build --setup-args=-Dblas=blas --setup-args=-Dlapack=lapack --setup-args=-Duse-g77-abi=true: (Build SciPy (default settings))
$ meson compile -j 8 -C build
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /Users/lucascolley/ghq/github.com/scipy/scipy/.pixi/envs/build/bin/ninja -C /Users/lucascolley/ghq/github.com/scipy/scipy/build -j 8
ninja: Entering directory `/Users/lucascolley/ghq/github.com/scipy/scipy/build'
[2/356] Generating subprojects/highs/highs/HConfig.h with a custom command
$ meson install --only-changed -C build --destdir ../build-install --tags=runtime,python-runtime,tests,devel --skip-subprojects

✨ Pixi task (ipython in ipython): spin ipython --no-build: (Launch IPython)
$ export PYTHONPATH="/Users/lucascolley/ghq/github.com/scipy/scipy/build-install/usr/lib/python3.14/site-packages"
💻 Launching IPython with PYTHONPATH="/Users/lucascolley/ghq/github.com/scipy/scipy/build-install/usr/lib/python3.14/site-packages"

AI Disclosure

• This PR contains AI-generated content.
  • I have tested any AI-generated content in my PR.
  • I take responsibility for any AI-generated content in my PR.

Tools: ChatGPT

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added sufficient tests to cover my changes.
• I have verified that changes that would impact the JSON schema have been made in schema/model.py.

[baszalmstra]

I dont see how this fixes the issue? This is doing essentially the same thing? Should we not also deal with the hidden case?

[lucascolley]

I dont see how this fixes the issue? This is doing essentially the same thing?

mp.println prints spaces rather than a new line, this avoids that

Should we not also deal with the hidden case?

I think the mp.suspend just becomes an 'identity'/'null' closure (sorry I don't know the word) in the hidden case

[lucascolley]

but yeah I'm not sure if this breaks anything where we are calling pixi_progress::println! in the context of multiple progress bars. If it does then I guess we want to introduce a new macro like pixi_progress::printnewln!?

[lucascolley]

Should we not also deal with the hidden case?

I think the mp.suspend just becomes an 'identity'/'null' closure (sorry I don't know the word) in the hidden case

or maybe it is still necessary, looking at https://docs.rs/indicatif/latest/indicatif/struct.ProgressBar.html#method.println

[baszalmstra]

Maybe just change the mp.println to mp.suspend then?

[lucascolley]

Maybe just change the mp.println to mp.suspend then?

I think the current implementation is more concise and probably effectively equivalent, but feel free to push a change.