//! Qualities 3 to 9: greedy backward references and greedy meta-blocks.
//!
//! The search here is greedy with a one-byte lazy look-ahead, and the
//! meta-block is built in a single pass over the commands. Everything below
//! the decisions — commands, histograms, block splits, the bit writer — lives
//! in [`super::shared`], which the high-quality encoder uses as well.
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