syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"start_span:"}]}
source_snippet:                     start_span: pat.span.shrink_to_lo(),
context_before:                 misc_suggestion = Some(MiscPatternSuggestion::AttemptedIntegerLiteral {
context_after:                 });