title: changing Majuscule and minuscule cases
body: <p>I have a file containing lines with one word in upper case and one other word in lower case like this :</p>
  
  <pre><code>"BAMBARA"{ "bambara" }
  </code></pre>
  
  <p>As output I want to have :</p>
  
  <pre><code>case(BAMBARA) { template("bambara") }.
  </code></pre>
  
  <p>So far I have <code>sed/"$"/case($)/</code>
  But it doesn't work at all. How can I do these specifying upper and lower case letters ?</p>