The default export breaks if multiline

[silvenon]

The following MDX:

export default ({ children }) => (
  <Layout>
    {children}
  </Layout>
)

transpiles into broken JSX:

export default ({components}) => <MDXTag name="wrapper" Layout={({ children }) => (} components={components}>
  <Layout>
    {children}
  </Layout>
)</MDXTag>

because the default export is being added using line-by-line interpolation.

[ChristopherBiscardi]

afaict, this is only the case for an mdx file without any content. While the first example here produces weird output, the second works just fine (codesandbox).

const t = mdx.sync(
  `export default ({ children }) => (
  <Layout>
    {children}
  </Layout>
)`
);

const t = mdx.sync(
  `export default ({ children }) => (
  <Layout>
    {children}
  </Layout>
)

some content`
);