syntax_data: {"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                                 let sp = brace_span.shrink_to_hi().with_hi(expr_span.hi());
context_before:                             if sm.span_to_snippet(sm.next_point(brace_span)).as_deref() == Ok("{") {
context_after:                                 // We also need to extend backwards for whitespace