title: How to add a character at the end of each line with awk?
body: <p>I would like to add character <code>A</code> at the end of each line in a text file. How can I do this with awk?</p>
  
  <pre class="lang-none prettyprint-override"><code>1AAB
  VBNM
  JHTF
  2SDA
  </code></pre>
  
  <p>Desired output</p>
  
  <pre class="lang-none prettyprint-override"><code>1AABA
  VBNMA
  JHTFA
  2SDAA
  </code></pre>