Replaced mention of 'background-clip' with 'background-size' in the

section about the latter. (Error found by Masataka Yakura.)

Author: bert-github

css3-background/Overview.src.html

@@ -1107,7 +1107,7 @@ <h3 id="the-background-size">The 'background-size' property</h3>
 if it had been a transparent image.)
 
 <p>See the section <a href="#layering">“Layering multiple background
-images”</a> for how 'background-clip' interacts with other
+images”</a> for how 'background-size' interacts with other
 comma-separated background properties to form each background image
 layer.