syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // A space-separated option, like `-C incremental=foo` or `--crate-type rlib`
context_before:             let content = if arg.len() == a.len() {
context_after:                 match args.next() {