let span = cx.sess().source_map().stmt_span(stmt.span, data.loop_block.span);
let snip = snippet_block(cx, span, "..", None).into_owned();
snip.lines()
let span = cx.sess().source_map().stmt_span(stmt.span, data.loop_block.span);
let snip = snippet_block(cx, span, "..", None).into_owned();
snip.lines()