trailingSlash seemingly not respected for prerendered +server.js

[AlanBreck]

I have very simple endpoint with a GET handler that response with basic HTML. The path is src/routes/skus/+server.js. I'm using adapter-static for this, so I've added an export const prerender = true; to the top of the file.

The endpoint gets prerendered, but instead of being build/skus/index.html, like the other routes due to trailingSlash: true, the resulting file is build/skus.html.

This behavior only appeared since upgrading to 1.0.0-next.462.

Anyway to get it to output to build/skus/index.html?