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Document configuration file

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David Tolnay 2019-02-13 10:27:50 -08:00
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@ -118,6 +118,20 @@ To expand a specific module or type or function only:
[fatarrow.png]: https://raw.githubusercontent.com/dtolnay/cargo-expand/screenshots/fatarrow.png
[syn]: https://github.com/dtolnay/syn
## Configuration
The cargo expand command reads the `[expand]` section of $CARGO_HOME/config if
there is one. Currently the only configuration option is the syntax highlighting
theme.
```toml
[expand]
theme = "TwoDark"
```
Run `cargo expand --themes` to print a list of available themes. Use `theme =
"none"` to disable coloring.
## Disclaimer
Be aware that macro expansion to text is a lossy process. This is a debugging