syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"f.write_str(\"&\")?;"}]}
source_snippet:         f.write_str("&")?;
context_before:     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
context_after:         if self.is_mut {