syntax_data: {"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"block_id"}]}
source_snippet:             block_id = block.index(),
context_before:             concat!("<tr>", r#"<td colspan="3" sides="tl">bb{block_id}</td>"#, "</tr>",),
context_after:         )?;