wolf-graph-dot 0.1.0

Adds support for generating Graphviz DOT files from wolf-graph graphs.
Documentation 
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum EdgeStyle {
    Dashed,
    Dotted,
    Solid,
    Invis,
    Bold,
    Tapered,
}

impl std::fmt::Display for EdgeStyle {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let value = match self {
            EdgeStyle::Dashed => "dashed",
            EdgeStyle::Dotted => "dotted",
            EdgeStyle::Solid => "solid",
            EdgeStyle::Invis => "invis",
            EdgeStyle::Bold => "bold",
            EdgeStyle::Tapered => "tapered",
        };
        write!(f, "{}", value)
    }
}