Update documentation

Author: AllenDowney

_sources/chap12.ipynb

@@ -2285,7 +2285,7 @@
    "metadata": {},
    "source": [
     "Dictionaries provide a method called `setdefault` that we can use to do the same thing more concisely.\n",
-    "Ask a virtual assistant how it works, or copy `add_word` into a virtual assistant and ask \"Can you rewrite this using `setdefault`?\"\n",
+    "Ask a virtual assistant how it works, or copy `add_bigram` into a virtual assistant and ask \"Can you rewrite this using `setdefault`?\"\n",
     "\n",
     "In this chapter we implemented Markov chain text analysis and generation.\n",
     "If you are curious, you can ask a virtual assistant for more information on the topic.\n",

chap12.html

@@ -1429,7 +1429,7 @@ <h3><span class="section-number">12.12.1. </span>Ask a virtual assistant<a class
 </div>
 </div>
 <p>Dictionaries provide a method called <code class="docutils literal notranslate"><span class="pre">setdefault</span></code> that we can use to do the same thing more concisely.
-Ask a virtual assistant how it works, or copy <code class="docutils literal notranslate"><span class="pre">add_word</span></code> into a virtual assistant and ask “Can you rewrite this using <code class="docutils literal notranslate"><span class="pre">setdefault</span></code>?”</p>
+Ask a virtual assistant how it works, or copy <code class="docutils literal notranslate"><span class="pre">add_bigram</span></code> into a virtual assistant and ask “Can you rewrite this using <code class="docutils literal notranslate"><span class="pre">setdefault</span></code>?”</p>
 <p>In this chapter we implemented Markov chain text analysis and generation.
 If you are curious, you can ask a virtual assistant for more information on the topic.
 One of the things you might learn is that virtual assistants use algorithms that are similar in many ways – but also different in important ways.