Function light_phylogeny::get_contour_tidy_left

pub fn get_contour_tidy_left(
    tree: &mut ArenaTree<String>,
    index: usize,
    depth: usize,
    contour_left: &mut Vec<(f32, f32, String)>,
    ymax: &mut f32,
    options: &Options,
    config: &Config
)

Get the left ‘contour’ of a sub tree in the “tidy” context.