syntax_data: {"ast_node_type":"other","tokens":[{"end":173,"kind":"keyword","start":0,"text":"early_dcx.early_note(\"for"}]}
source_snippet:             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_before:             early_dcx.early_note("selecting a toolchain with `+toolchain` arguments require a rustup proxy; see <https://rust-lang.github.io/rustup/concepts/index.html>");
context_after:             early_dcx.early_fatal(format!(