syntax_data: {"ast_node_type":"variable","tokens":[{"end":34,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let arch = arch.target_name();
context_before: fn unversioned_llvm_target(os: &str, arch: Arch, abi: TargetAbi) -> StaticCow<str> {
context_after:     // Convert to the "canonical" OS name used by LLVM: