document default value change

Author: mbostock

docs/marks/tip.md

@@ -251,7 +251,7 @@ These [standard text options](./text.md#text-options) control the display of tex
 - **textAnchor** - the [text anchor](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/text-anchor) for horizontal position; *start*, *end*, or *middle*
 - **lineHeight** - the line height in ems; defaults to 1
 - **lineWidth** - the line width in ems, for wrapping; defaults to 20
-- **textOverflow** - how to wrap or clip lines longer than the specified line width
+- **textOverflow** - how to wrap or clip lines longer than the specified line width; defaults to *ellipsis* <VersionBadge pr="2322" />
 
 ## tip(*data*, *options*) {#tip}