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# Description
This script as example for demonstration
```nushell
def miku [] { print "Hiii world! 初音ミクはみんなのことが大好きだよ！" }
def main [leek: int, fn: closure] {
print $"Miku has ($leek) leeks 🩵"
do $fn
}
```
---
`escape_for_string_arg` quoting strings misses, where `|` and `;` did
split the command into 2+ commands
```console
~:► nu ./miku.nu '32' '{miku}'
Miku has 32 leeks 🩵
Hiii world! 初音ミクはみんなのことが大好きだよ！
~:► nu ./miku.nu '32' '{miku};ls|' where type == dir
Miku has 32 leeks 🩵
Hiii world! 初音ミクはみんなのことが大好きだよ！
╭────┬─────────────┬──────┬────────┬──────────────╮
│ # │ name │ type │ size │ modified │
├────┼─────────────┼──────┼────────┼──────────────┤
│ 0 │ Desktop │ dir │ 4.0 kB │ 5 months ago │
│ 1 │ Documents │ dir │ 4.0 kB │ a day ago │
│ 2 │ Downloads │ dir │ 4.0 kB │ a day ago │
│ 3 │ Music │ dir │ 4.0 kB │ 9 months ago │
│ 4 │ Pictures │ dir │ 4.0 kB │ 3 weeks ago │
│ 5 │ Public │ dir │ 4.0 kB │ 9 months ago │
│ 6 │ Templates │ dir │ 4.0 kB │ 3 months ago │
│ 7 │ Videos │ dir │ 4.0 kB │ 9 months ago │
│ 8 │ __pycache__ │ dir │ 4.0 kB │ 3 weeks ago │
│ 9 │ bin │ dir │ 4.0 kB │ 3 days ago │
│ 10 │ repos │ dir │ 4.0 kB │ a day ago │
│ 11 │ trash │ dir │ 4.0 kB │ 3 days ago │
╰────┴─────────────┴──────┴────────┴──────────────╯
```
# User-Facing Changes
This adjustment won't need a change, aside from clarifying the following
behavior, which is unintuitive and potentially ambiguous
```console
~:► nu ./miku.nu '32' {miku}
Miku has 32 leeks 🩵
Hiii world! 初音ミクはみんなのことが大好きだよ！
~:► nu ./miku.nu '32' { miku }
Error: nu::parser::parse_mismatch
× Parse mismatch during operation.
╭─[<commandline>:1:9]
1 │ main 32 "{ miku }"
· ─────┬────
· ╰── expected block, closure or record
╰────
~:► nu ./miku.nu '32' '{' miku '}'
Miku has 32 leeks 🩵
Hiii world! 初音ミクはみんなのことが大好きだよ！
```
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.