Method fmt

tools/streamline.rs:27–33

(&self, f: &mut std::fmt::Formatter)

impl std::fmt::Display for StreamlineKind {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            // important: Should match clap::ValueEnum format
            StreamlineKind::PerVertex => write!(f, "per-vertex"),
            StreamlineKind::PerCentroid => write!(f, "per-centroid"),
        }
    }
}

/// Generate vector field streamlines for the given geometries