[css-properties-values-api] Fix abstract and example title.

Author: shans

css-properties-values-api/Overview.bs

@@ -5,7 +5,7 @@ Group: houdini
 ED: https://drafts.css-houdini.org/css-properties-values-api-1/
 Shortname: css-properties-values-api
 Level: 1
-Abstract: This CSS module defines an API for registering new CSS properties. Properties registered using this API are provided with a parse syntax that defines a type, inheritance behaviour, and a default value.
+Abstract: This CSS module defines an API for registering new CSS properties. Properties registered using this API are provided with a parse syntax that defines a type, inheritance behaviour, and an initial value.
 Editor: Tab Atkins, jackalmage@gmail.com
 Editor: Shane Stephens, shanestephens@google.com
 Editor: Daniel Glazman, daniel.glazman@disruptive-innovations.com
@@ -248,7 +248,7 @@ For example, the following are all valid syntax strings.
 
 </div>
 
-Calculation of Computed values {#calculation-of-computed-values}
+Calculation of Computed Values {#calculation-of-computed-values}
 ----------------------------------------------------------------
 
 The syntax of a custom property fully determines how computed values are
@@ -278,8 +278,8 @@ primitives in the list.
 Examples {#examples}
 ====================
 
-Example 1: Polyfill scale, translate, rotate {#example-1}
----------------------------------------------------------
+Example 1: Using custom properties to add animation behavior {#example-1}
+-------------------------------------------------------------------------
 
 <pre class='lang-markup'>
 &lt;script&gt;