Svelte template don't render code attributes

[Tlahey]

Describe the bug
Hello, I try my luck here.

Since Storybook ^6.4.0, svelte code doc doesn't render the parameters.

To Reproduce

• Create a svelte project with npx sb init and run it.
• Go to your localhost and Button component. On the Docs tab, you can click on show code and you will see this
  
• But if you rollback to the v6.3.13 on your package.json + npm i, you don't have any troubles.
  

Additional context
I don't know if it is a new feature of @storybook/svelte that causes this regression or the addon @storybook/addon-svelte-csf need an issue.

Thanks.

[lauthieb]

Hi @shilman & all core contributors, we have this bug on https://github.com/Decathlon/vitamin-web/issues/990 reported by @GaspardMathon thanks to the work of @Tlahey.
Can you please help us? Thanks a lot in advance 🙏

[lauthieb]

Hi Storybook team. Can you please help us? Thanks a lot :)

[shilman]

Zoinks!! I just released https://github.com/storybookjs/storybook/releases/tag/v6.5.0-alpha.57 containing PR #17866 that references this issue. Upgrade today to the @next NPM tag to try it out!

npx sb upgrade --prerelease

Closing this issue. Please re-open if you think there's still more to do.