/// `[ ... ]`
#[stable(feature = "proc_macro_lib2", since = "1.29.0")]
Bracket,
- /// `Ø ... Ø`
+ /// `/*«*/ ... /*»*/`
/// An invisible delimiter, that may, for example, appear around tokens coming from a
/// "macro variable" `$var`. It is important to preserve operator priorities in cases like
/// `$var * 3` where `$var` is `1 + 2`.
- /// Invisible delimiters might not survive roundtrip of a token stream through a string.
+ /// Invisible delimiters are not directly writable in normal Rust code except as comments.
+ /// Therefore, they might not survive a roundtrip of a token stream through a string.
#[stable(feature = "proc_macro_lib2", since = "1.29.0")]
None,
}