v0.2.0

This release adds in-place document normalization to the Python and JavaScript bindings, teaches the parser and serializer to preserve whitespace and spacing faithfully, and makes parsing and transforming large formulas dramatically faster.

Added

• TransformEngine.transform on the Python and JavaScript bindings, for normalizing a live Document in place. Every parsed document is stamped with a parse-context id, and a document produced by a different parser (or by Document.from_syntax) is rejected with a foreign-document error, so a document is only transformed by the engine that produced it.
• :O operator-name argspec content, so arguments to \operatorname and \DeclareMathOperator are modeled as math content and serialized compactly without special-casing command names.
• Typed serialization options for the Python bindings: serialize() and Document.to_latex() now accept a documented SerializeOptions TypedDict instead of an untyped dict, mirroring the TypeScript option interfaces.

Changed

• Breaking: the public Error enum is now #[non_exhaustive]. Exhaustive match arms over texform::Error in downstream Rust must add a wildcard arm; in return, future error variants can be introduced without another breaking change.
• Parsing and transforming large formulas is dramatically faster. Release builds no longer run debug-only structural invariant sweeps, which were quadratic on wide formulas (a 60k-character formula now parses ~14× faster and transforms ~45× faster); source spans are carried as a positional tree (10–25% faster parsing); and rewrite rules are indexed by trigger name (31–48% faster transforms). Normalized output is byte-identical.

Fixed

• Edge whitespace in text arguments is preserved: \text{ or } and \textbf{ a } no longer drop their leading and trailing spaces on parse, serialize, or transform.
• Adjacent math digits stay compact: multi-digit numbers such as 1093^2 no longer serialize as 1 0 9 3 ^ { 2 } under the default spacing option, while letters and symbols still honor it.
• Tight argspec slot spacing is preserved, so no-leading-space slots — including linebreak dimensions and custom tight optional slots — stay tight through parse/serialize round trips.
• Whitespace is kept outside attribute wrappers during transforms.
• Inline math inside text-mode control sequences, and whitespace-only text arguments, are now accepted.
• The recovery parser is hardened against an unnecessary unwrap.
• The license file is included in the Python sdist.