syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"\"normal\""}]}
source_snippet:         "normal" => Source(PpSourceMode::Normal),
context_before:     let first = match unstable_opts.unpretty.as_deref()? {
context_after:         "identified" => Source(PpSourceMode::Identified),