mrml 6.0.0

Rust implementation of MJML renderer
Documentation 
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use crate::mj_preview::MjPreviewChild;
use crate::prelude::print::Printable;

impl Printable for super::MjPreview {
    fn print<P: crate::prelude::print::Printer>(&self, printer: &mut P) -> std::fmt::Result {
        printer.push_indent();
        printer.open_tag(super::NAME)?;
        printer.close_tag();
        for item in self.children.iter() {
            match item {
                MjPreviewChild::Text(inner) => {
                    printer.push_str(inner.inner_str());
                }
                MjPreviewChild::Comment(inner) => inner.print(printer)?,
            }
        }
        printer.end_tag(super::NAME)?;
        printer.push_new_line();
        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use crate::prelude::print::Printable;

    #[test]
    fn normal() {
        let item = crate::mj_preview::MjPreview::from("Hello World!");
        assert_eq!(
            "<mj-preview>Hello World!</mj-preview>",
            item.print_dense().unwrap()
        );
    }
}