Fix incorrect unit display names: preserve hyphens and fix whitespace normalization

[Copilot]

Two bugs in the unit name processing pipeline were producing incorrect display names in the generated C# units (e.g., "kilogramforce" instead of "kilogram-force", "volt ampere" instead of "volt - ampere").

Bug 1 — normalize_unit_name incorrectly stripped hyphens (normalizer.py)

The method removed all - characters from unit names, citing pint parsing issues. Unit names are never passed to pint (only symbol and conversion_factor are), so the stripping only corrupted display values.

# Before — hyphens stripped for no valid reason
return normalized_name.replace("-", "")

# After — just normalize whitespace like every other string field
return Normalizer.normalize_value(name)

Affected names include kilogram-force, pound-force, milli-inch, volt - ampere, and ~30 others. Names like "volt - ampere" additionally produced double spaces ("volt ampere") since the surrounding spaces were left behind after - removal.

Bug 2 — Sanitize discarded whitespace normalization result (Generator.cs)

The regex replace result was never assigned back, leaving multi-whitespace sequences intact in generated C# string literals.

// Before — result discarded
WhitespaceRegex().Replace(value, " ");

// After
value = WhitespaceRegex().Replace(value, " ");

Impact

• parsedUneceUnits.json regenerated with correct names
• C# generated files regenerated — property names now properly cased (e.g., KilogramForce instead of Kilogramforce) and Name values match the UNECE standard

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.