If set, and content was cut at either edge of the requested range, insert this string at the cut edge(s). The ellipsis is counted against the visible-width budget and is emitted inside any active SGR styles (color, bold, etc.) so it inherits them, but outside any active OSC 8 hyperlink.
This turns sliceAnsi into a drop-in cli-truncate replacement:
- truncate-end:
sliceAnsi(str, 0, max, { ellipsis: "\u2026" }) - truncate-start:
sliceAnsi(str, -max, undefined, { ellipsis: "\u2026" })