title: Capitalize a word based on a matching word in a list
body: <p>Working through a "Coursera Python" course and I am having a lot of trouble.</p>
  
  <p>The <code>highlight_word</code> function changes the given word in a sentence to its upper-case version. For example, <code>highlight_word("Have a nice day", "nice")</code> returns <code>"Have a NICE day"</code>. I want help to rewrite this function in just one line?</p>
  
  <pre><code>def highlight_word(sentence, word):
      return(___)
  
  print(highlight_word("Have a nice day", "nice"))
  print(highlight_word("Shhh, don't be so loud!", "loud"))
  print(highlight_word("Automating with Python is fun", "fun"))
  </code></pre>
  
  <p>I think I can do this in a larger statement but does anyone know how to return this correctly in a single line? I am guessing it will involve a list comprehension.</p>