[css-color-4][editorial] better autolinking

css-color-4/Overview.bs

@@ -4568,13 +4568,14 @@ Color Interpolation</h2>
  takes place by executing the following steps:
 
  <ol>
- <li>checking the two colors for [=analogous components=] which will be carried forward</li>
+ <li>checking the two colors for [=analogous components=] 
+ which will be <dfn export>carried forward</dfn></li>
  <li>converting them to a given color space
  which will be referred to as the <dfn export>interpolation color space</dfn> below. 
  If one or both colors are already in the interpolation colorspace,
  this conversion changes any [=powerless=] components to [=missing=] values
  </li>
- <li>(if required) re-inserting carried-forward values in the converted colors</li>
+ <li>(if required) re-inserting [=carried-forward=] values in the converted colors</li>
  <li>(if required) fixing up the hues, depending on the selected <<hue-interpolation-method>></li>
  <li>changing the color components to premultiplied form</li>
  <li>linearly interpolating each component of the computed value of the color separately</li>