{"ast_node_type":"impl","tokens":[{"end":92,"kind":"keyword","start":0,"text":"///"}]}
    /// probably be checking for a `PartialEq` impl instead, but this preserves the behavior
    /// requires that `&'static str <: T_x`, where `T_x` is the type of `x`. Really, we should
    /// of the old type-check for now. See #57280 for details.