syntax_data: {"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"(default:"}]}
source_snippet:         (default: yes)"),
context_before:         "flatten nested format_args!() and literals into a simplified format_args!() call \
context_after:     fmt_debug: FmtDebug = (FmtDebug::Full, parse_fmt_debug, [TRACKED],