syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:                     for diff in diff_iter {
context_before:                     raw_diffs = Vec::with_capacity(bytes_per_diff * num_diffs);
context_after:                         raw_diffs.extend_from_slice(&(diff.0).to_le_bytes());