Iron(III) Oxide

### Problem you are trying to solve I'm reading [this](https://rust-lang.github.io/rustup/concepts/index.html) page, the list of terminology. I see that "proxy" is missing. It should be mentioned in the terminology list. ###...

correction: multithreaded, but not asynchronous

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This is not asynchronous, since you haven't actually used the async/await syntax. You have multiple threads (thus multithreaded) but each thread doesn't encounter a `Future` with missing values that makes...

Parse into file, line, column

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- [ ] Added an entry to `CHANGELOG.md` if this change could be valuable to users Addresses https://github.com/lapce/lapce/issues/1872

Refactor command.rs

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- [ ] Added an entry to `CHANGELOG.md` if this change could be valuable to users

Addresses https://github.com/rust-lang/mdBook/issues/1969. This is intended to allow the user to browse the documents with the same convenience as `mdbook build --open`, but without building a book redundantly when it's already...

`mdbook watch` hijacks the terminal

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When I run `mdbook build --open`, then it lets me browse the documentation without having to keep the terminal busy/occupied. Just browse the docs and keep doing other stuff in...

Major lack of documentation in codebase

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**Describe the bug** The codebase significantly lacks documentation. As a newly introduced developer, it makes it hard for me to navigate the codebase and quickly identify which item does what....

I'm quoting [this](https://doc.rust-lang.org/reference/const_eval.html) page: `Constant evaluation is the process of computing the result of expressions during compilation.` Q) How does it look like? Please demonstrate `Only a subset of all...

Add tests for async_channel

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addresses 3rd checkbox in https://github.com/theseus-os/Theseus/issues/715 Let me know if I did it correctly and if there's anything missing