Format Rust code

[jayvdb]

Previous PR #271 over a year old and has no feedback.

Older open PRs, also no feedback

• Ran rustfmt and added formatting checks to CI #248
• Format code using 'cargo fmt' #154

I didnt see any closed PRs.

[fintelia]

This project is in maintenance mode and not seeking further development. Additionally, reformatting PRs like this can really only be done by maintainers because manually reviewing every change in a PR like this would be both time consuming and pointless

[jayvdb]

We rely on the lossless functionality and have related fixes to submit. c.f. https://github.com/franklin-ai/jpeg-decoder/commits/main/

If you would like to re-do this PR yourself, here are the steps that I took

1. added #[rustfmt::skip] before pub fn fill_default_mjpeg_tables( and the nicely formatted tables at https://github.com/image-rs/jpeg-decoder/blob/4035b7e/src/arch/wasm.rs#L245-L261 , so that rustfmt doesnt make a mess of them.
2. In src/huffman.rs, src/parser.rs, src/upsampler.rs , src/worker/immediate.rs, tests/lib.rs, and tests/rayon*.rs , add a blank line between std, external and crate use statements, otherwise rustfmt (stable) will jumble them all up.
3. Run cargo fmt

That is all.

[kornelski]

This isn't an improvement. Every rustfmt change is making the code slightly worse, and peppers it with #[rustfmt::skip] unnecessarily.

If you have an editor that unconditionally reformats, then .rustfmt.toml with disable_all_formatting = true can help.