Hyphenated word interrupted by a system break gets a hyphen at the end of the outgoing line only

When a hyphenated word splits across a system (line) break, a hyphen is placed at the end of the first system after the syllable, and the word continues at the start of the next system with no additional leading hyphen. Dorico and Finale both follow this — no double hyphen, and no hyphen orphaned alone at the start of a new system.

A hyphenated word's break point coincides with the barsPerSystem-driven system wrap, and the renderer either omits the hyphen entirely at the line end or draws a hyphen dangling at the very start of the new system with nothing before it.

Gould (hyphens across a line break); Read.

This rule needs the notated content and the rendered result together — the score says what should happen, the page says whether it did.