Nu Shell - This Week in Nu #40

# This week in Nu #40 - JosephTLyons added more help for contributors to [CONTRIBUTING.md](http://contributing.md) ([#1865](https://github.com/nushell/nushell/pull/1865)), improve the `cal` implementation ([#1885](https://github.com/nushell/nushell/pull/1886)) and documentation ([#1895](https://github.com/nushell/nushell/pull/1895)), added ctrl-c support to `du` ([#1901](https://github.com/nushell/nushell/pull/1901)) - AarconC81 added completions for binaries in the PATH ([#1866](https://github.com/nushell/nushell/pull/1866)) - shiena fixed a link in our Japanese documentation ([#101](https://github.com/nushell/book/pull/101), [#103](https://github.com/nushell/book/pull/103)) - Kelli314 helped improved light mode table printing ([#1871](https://github.com/nushell/nushell/pull/1871)) - q-b helped fix some typos in the book ([#102](https://github.com/nushell/book/pull/102)) - k-brk added `--to-float` to the `str` command ([#1872](https://github.com/nushell/nushell/pull/1872)), improved the `with-env` shorthand ([#1900](https://github.com/nushell/nushell/pull/1900)) - jzaefferer documented the new `--save` flag for `alias` ([#1874](https://github.com/nushell/nushell/pull/1874)) - thegedge simplified the logic in the `parse` command ([#1875](https://github.com/nushell/nushell/pull/1875), [#1904](https://github.com/nushell/nushell/pull/1904)) - EmNudge documented the `trim` command ([#1876](https://github.com/nushell/nushell/pull/1876)) - notryanb fixed some flaky external command tests ([#1878](https://github.com/nushell/nushell/pull/1878)) - andrasio converted the `split` commands into sub-commands ([#1879](https://github.com/nushell/nushell/pull/1879)), moved `str` to being a built-in command ([#1908](https://github.com/nushell/nushell/pull/1908)), fixed an issue with plugins not having "end_filter" called correctly ([#1914](https://github.com/nushell/nushell/pull/1914)), updated docs for `split` and `from` ([#104](https://github.com/nushell/book/pull/104)) - shaaraddalvi improved errors when sorting by invalid column ([#1880](https://github.com/nushell/nushell/pull/1880)) - fdncred improved auto-pivot's configuration ([#1888](https://github.com/nushell/nushell/pull/1888)), added "plugin_dir" to config docs ([#1911](https://github.com/nushell/nushell/pull/1911)), got nu-jupyter working online ([#2](https://github.com/nushell/nu_jupyter/pull/2)) - jonathandturner optimized processing time for `where` and related commands ([#1902](https://github.com/nushell/nushell/pull/1902)), made it-expansion work on lists ([#1903](https://github.com/nushell/nushell/pull/1903)), allowed `echo` to iterate ranges ([#1905](https://github.com/nushell/nushell/pull/1905)), simplified plugin directory scanning ([#1910](https://github.com/nushell/nushell/pull/1910))

This week's Nu Shell update includes contributions from multiple developers, focusing on improvements to documentation, command functionality, and error handling. Key updates include added help for contributors, improved `cal` implementation, ctrl-c support for `du`, completions for binaries in PATH, light mode table printing improvements, and the conversion of `split` commands into sub-commands.