syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"concat!(\"<tr>\","}]}
source_snippet:             concat!("<tr>", r#"<td colspan="3" sides="tl">bb{block_id}</td>"#, "</tr>",),
context_before:             w,
context_after:             block_id = block.index(),