continue and break keyword related errors invalidly include the next token into span

[nagisa]

Once #28105 is fixed, there’s still an issue of both continue and break keyword spans including a token after the keyword into a span.

e.g. for

fn main() { break }

span includes the closing brakcet

<anon>:1 fn main() { break }
                     ^~~~~~~

[marcusklaas]

I've got a fix for this!