Function ellipsis_to_cells_text 

pub fn ellipsis_to_cells_text(
    registry: &GlyphRegistry,
    text: &str,
    w: usize,
    ellipsis: &str,
) -> String

Ellipsize a plain string to at most w cells using the provided ellipsis.

If the ellipsis itself does not fit, it will be clipped to w.