//! The studio: a minimal collaborative text editor composed entirely from the
//! crate's shipped materials, assembled as tests (S110). The composition is a
//! probe: it measures where the shipped parts fit and where they chafe, so the
//! `measurements_report` test and the slice's returned report can drive the
//! next round of design. No production code is touched; the editor lives here.
/// A dot literal, for the probes that spell an identity by hand. Panics on
/// the non-dot counter zero, which no scenario here means to name.