The README documents a keyword arguments constructor pattern for Unit.new (line 57), but this initialization method lacked test coverage.

Changes

• Added test coverage for Unit.new(scalar:, numerator:, denominator:) constructor in spec/ruby_units/unit_spec.rb
• Test verifies scalar value, units string, kind detection, and standard unit properties

Example

# This constructor pattern is now tested:
unit = Unit.new(scalar: 1.5, numerator: ["<meter>"], denominator: ["<second>"])
# => 1.5 m/s (speed)

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