Docstrings are ignored by svelte2tsx

[fnune]

Edit: made a PR to fix it here #282

Problem

In util.ts:

/** Says hello */
export function sayHello() {
  return 'hello!'
}

Then, in some component:

<script type="text/typescript">
  import { sayHello } from './util'

  sayHello()
</script>

Hovering sayHello in VSCode or Vim/Neovim with coc.nvim doesn't show the docstring. I believe this is because these docstrings aren't added back by svelte2tsx? Edit: it was the language server provider.

Solution

Add docstrings that follow JSDoc TSDoc notation (which is what TypeScript uses) into the generated TSX.

Additional context

I found out about this shortcoming while working on a pull request for this #280
I believe the fixes are separate units of work, though.

[fnune]

I'm a bit confused. I believe the issue isn't actually in svelte2tsx, because (at least going by the tests) comments aren't removed from the produced TSX:

[fnune]

Starting to think it's the language server provider that's not making use of the comments.