syntax_data: {"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"early_dcx.early_fatal(format!("}]}
source_snippet:             early_dcx.early_fatal(format!(
context_before:             early_dcx.early_note("for more information about Rust's stability policy, see <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html#unstable-features>");
context_after:                 "{} nightly option{} were parsed",