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# Description closes #8934 this pr improves the diagnostic emitted when the name and parameters of either `def`, `def-env` or `extern` are not separated by a space ```nu Error: × no space between name and parameters ╭─[entry #1:1:1] 1 │ def err[] {} · ▲ · ╰── expected space ╰──── help: consider adding a space between the `def` command's name and its parameters ``` from ```nu Error: nu::parser::missing_positional × Missing required positional argument. ╭─[entry #1:1:1] 1 │ def err[] {} ╰──── help: Usage: def <def_name> <params> <body> ``` --------- Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com> Co-authored-by: Jelle Besseling <jelle@pingiun.com>
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.