Fix wrong method name in Chapter 16

Author: marijnh

16_canvas.txt

@@ -323,7 +323,7 @@ can see the effect of the control point: the lines leaving the lower
 corners start off in the direction of the control point and then
 ((curve)) toward their target.
 
-(((canvas)))(((bezierCurve method))) The `bezierCurve` method draws a 
+(((canvas)))(((bezierCurveTo method))) The `bezierCurveTo` method draws a
 similar kind of curve. Instead of a single ((control point)), this one
 has two—one for each of the ((line))'s endpoints. Here is a similar sketch to
 illustrate the behavior of such a curve:

html/errata.html

@@ -38,4 +38,10 @@ <h2>Chapter 14</h2>
 and <a href="14_event.html#p_fndkFYbayW">comment</a> for a better
 way.</p>
 
+<h2>Chapter 16</h2>
+
+<p><strong>Page 281</strong> (Curves): The text refers to
+the <code>bezierCurve</code> method. This method is actually
+called <code>bezierCurveTo</code> (as in the example code).</p>
+
 </article>