syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"Ok(Self::LlvmArg(arg.to_string().into()))"}]}
source_snippet:             Ok(Self::LlvmArg(arg.to_string().into()))
context_before:         } else if let Some(arg) = s.strip_prefix("llvm-arg=") {
context_after:         } else {