ridgeline test

Author: Fil

docs/marks/area.md

@@ -296,7 +296,7 @@ Points along the baseline and topline are connected in input order. Likewise, if
 
 The area mark supports [curve options](../features/curves.md) to control interpolation between points. If any of the **x1**, **y1**, **x2**, or **y2** values are invalid (undefined, null, or NaN), the baseline and topline will be interrupted, resulting in a break that divides the area shape into multiple segments. (See [d3-shape’s *area*.defined](https://d3js.org/d3-shape/area#area_defined) for more.) If an area segment consists of only a single point, it may appear invisible unless rendered with rounded or square line caps. In addition, some curves such as *cardinal-open* only render a visible segment if it contains multiple points.
 
-The **line** option (boolean, defaults to false) indicates whether the mark should draw a line connecting the points with coordinates **x2** and **y2** (the “top of the area”). In that case, the **stroke** attribute defaults to *currentColor* and is applied to the line only, as well as the stroke opacity. The line uses the same **curve** as the area.
+The **line** option <VersionBadge pr="TK" /> (boolean, defaults to false) indicates whether the mark should draw a line connecting the points with coordinates **x2** and **y2** (the “top of the area”). In that case, the **stroke** attribute defaults to *currentColor* and is applied to the line only, as well as the stroke opacity. The line uses the same **curve** as the area.
 
 ## areaY(*data*, *options*) {#areaY}