Reproduction link or steps

In sv (svelte cli), we started to use tsdown and we just got this report sveltejs/cli#761
After investigations it looks like it's the way tsdown is bundling Template Literals.

Here is a repro where I compare the output of rolldown and tsdown

You can see that in the bundle we have <\/script> while I would expect </script>

What is expected?

I would expect </script>

What is actually happening?

When bundling </script>, we have <\/script> in the bundle.

Any additional comments?

If you run the script on the repo you will see this summary