[Parser] jsx fragment shouldn't be a fragment's child

[LuoZijun]

Spec: https://facebook.github.io/jsx/

Grammar:

JSXFragment :
    < > JSXChildren < / >

JSXChildren :
    JSXChild JSXChildren

JSXChild :
    JSXText
    JSXElement
    { JSXChildExpression }

That's means is say this is not correct ?

<> 
    <App2></App2>
    <> </>
</>

[kdy1]

I postponed this issue because babel currently supports

<> 
    <App2></App2>
    <> </>
</>

[koba04]

The syntax has been allowed in facebook/jsx#97, but it hasn't been synced to the website yet. facebook/jsx#128
I think it's fine swc allows the syntax, so this issue can be closed.

[kdy1]

Thanks!

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.