syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"debug!(\"{}-byte"}]}
source_snippet:             debug!("{}-byte char at {:?}", mbc.bytes, mbc.pos);
context_before:         for mbc in self.multibyte_chars.iter() {
context_after:             if mbc.pos < bpos {