//! The reader options every YAML document this repository reads is read under.
//!
//! Its own file so that the test binaries read YAML exactly as the crate does: they
//! include this file by path, since the module is private to the crate.
/// Plain `yes`, `no`, `on` and `off` stay strings and `<<` stays an ordinary key, as
/// they were before this crate read YAML through serde-saphyr; an error is one line
/// carrying its line and column rather than a rendered snippet; and a document may nest
/// 127 levels deep, the limit the earlier reader had, where serde-saphyr's own refuses
/// from 64.
pub