Nu Shell Updates - This Week in Nu #71

1st chunk of `blog/2021-01-01-twin0071.md`

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# This week in Nu #71

- ymgyt updated the [Japanese translation of the Nushell book](https://github.com/nushell/nushell.github.io/pull/79)
- baoyachi removed [some unused code](https://github.com/nushell/nushell/pull/2827)
- stormasm has been [refactoring nu-cli to make it simpler](https://github.com/nushell/nushell/pull/2828) (also [here](https://github.com/nushell/nushell/pull/2831) and [here](https://github.com/nushell/nushell/pull/2833))
- fdncred changed [`ls` to output a path for the name](https://github.com/nushell/nushell/pull/2829)
- max-sixty simplified [the internal run_block functionality](https://github.com/nushell/nushell/pull/2830), and updated the [docs for explaining pipelines and groups](https://github.com/nushell/nushell.github.io/pull/78)
- ArturKovacs replaced ['clipboard' with the newer 'arboard' crate](https://github.com/nushell/nushell/pull/2832)
- LhKipp extended ['which' to show aliases and custom commands](https://github.com/nushell/nushell/pull/2834)
- JosephTLyons fixed [all the new Rust 1.49 linting warnings](https://github.com/nushell/nushell/pull/2835)
- jonathandturner fixed [the `source` command to properly error](https://github.com/nushell/nushell/pull/2836) ([video available](https://www.youtube.com/watch?v=pBOZpyqldZQ)), and fixed [commands created inside of other commands to not leak out to the global scope](https://github.com/nushell/nushell/pull/2837)

Title: Nu Shell Updates - This Week in Nu #71

Summary

This week's updates to the Nu shell include a Japanese translation update, code cleanup, refactoring of nu-cli, improvements to `ls` and `which` commands, simplification of internal run_block functionality, crate updates, bug fixes related to Rust linting and the `source` command, and prevention of command scope leaking.