syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"lines.extend((0..*num_diffs).map(|i|"}]}
source_snippet:                 lines.extend((0..*num_diffs).map(|i| {
context_before:             2 => {
context_after:                     let pos = bytes_per_diff * i;