replace old ASCII > style with markdown code blocks

1990/pjr/index.html

@@ -176,9 +176,7 @@ it is done?</p>
 to functions!</p>
 <h3 id="spoiler">Spoiler:</h3>
 <p>This program prints out the string:</p>
-<blockquote>
-<p>the quick brown fox jumped over the lazy dog</p>
-</blockquote>
+<pre><code>    the quick brown fox jumped over the lazy dog</code></pre>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <p>It is simple to make the program print other strings. Each
 alphabetical character from a to z is printed out as its