{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"ast::AttrArgs::Eq"}]}
            ast::AttrArgs::Eq { eq_span, expr } => {
            // nonterminals in `#[doc]` (e.g. `#[doc = $e]`).
                // In valid code the value always ends up as a single literal. Otherwise, a dummy