syntax_data: {"ast_node_type":"other","tokens":[{"end":24,"kind":"keyword","start":0,"text":"(default:"}]}
source_snippet:         (default: no)"),
context_before:         "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) \
context_after:     dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],