syntax_data: {"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:             } else {
context_before:                 dcx.emit_err(InvalidFloatLiteralWidth { span, width: suf[1..].to_string() })
context_after:                 dcx.emit_err(InvalidFloatLiteralSuffix { span, suffix: suf.to_string() })