[orx-shade-styles] Write comments on demos

orx-shade-styles/src/jvmDemo/kotlin/gradients/DemoGradient07.kt

@@ -10,6 +10,14 @@ import org.openrndr.extra.shadestyles.fills.gradients.gradient
 import org.openrndr.extra.shapes.primitives.grid
 import org.openrndr.math.Vector2
 
+/**
+ * A design with 48 vertical bands with gradients. Each one has a unique `quantization`
+ * value based on the index of the band. All bands have 2 color `stops`:
+ * `WHITE` at the top (position 0.0), and `BLACK` near the bottom (near position 1.0),
+ * with the exact value depending on the `quantization` value.
+ *
+ * Demonstrates how to produce a quantized gradient with a specific number of equal color bands.
+ */
 fun main() = application {
     configure {
         width = 720
@@ -25,7 +33,7 @@ fun main() = application {
                 drawer.shadeStyle = gradient<ColorRGBa> {
                     quantization = index + 2
                     stops[0.0] = ColorRGBa.WHITE
-                    stops[ (quantization) / (quantization+1.0)] = ColorRGBa.BLACK
+                    stops[(quantization) / (quantization + 1.0)] = ColorRGBa.BLACK
 
                     fillUnits = FillUnits.BOUNDS
                     fillFit = FillFit.COVER