Currently the suffix feature is always appended to setting values, including ones that have explicit labels.

When an explicit value label is provided for a setting, the suffix should not be appended.

option.LIGHTING_TINT_STRENGTH=Tint Strength
option.LIGHTING_TINT_STRENGTH.comment=Determines how strongly light is tinted through stained glass.
suffix.LIGHTING_TINT_STRENGTH=%
value.LIGHTING_TINT_STRENGTH.0=OFF

the result of the above example is currently Tint Strength: OFF%, when the expected result for value 0 is Tint Strength: OFF (no %)

or a better example (and why I'm finally raising an issue)

option.WORLD_CURVE_RADIUS=Overworld Radius (meters)
suffix.WORLD_CURVE_RADIUS=,000
value.WORLD_CURVE_RADIUS.0=FLAT

which show : FLAT,000 instead of FLAT or 16,000

Fixed in f0f6a27