Mark some errata as fixed in 2nd reprint

Author: marijnh

html/errata.html

@@ -32,13 +32,13 @@ <h2>Chapter 2</h2>
 
 <h2>Chapter 6</h2>
 
-<p><strong>Page 111</strong> <em>Inheritance</em>: In the second
+<p><strong>Page 111</strong> (2nd) <em>Inheritance</em>: In the second
 paragraph below the example code, instead of “<code>content</code>
 method”, the text should say “<code>element</code> function”.
 
 <h2>Chapter 8</h2>
 
-<p><strong>Page 134</strong> <em>Error Propagation</em>: In the third
+<p><strong>Page 134</strong> (2nd) <em>Error Propagation</em>: In the third
 paragraph of the section, a function <code>promptInteger</code> is
 referred to. The function is actually
 called <code>promptNumber</code>, and the word “whole” should be
@@ -52,7 +52,7 @@ <h2>Chapter 10</h2>
 
 <h2>Chapter 16</h2>
 
-<p><strong>Page 285</strong> <em>Pausing the Game</em>: The text
+<p><strong>Page 285</strong> (2nd) <em>Pausing the Game</em>: The text
 refers to the <code>arrow</code> binding, where it should
 say <code>arrowKeys</code>.</p>