title: Vim: sudo errors in writing a selection
body: <p>How can I circumvent the errors, such as E212 and E13, in the commands?</p>
  
  <pre><code>:'a,'bw set_question_tags.php
  :'a,'bw &gt;&gt; set_question_tags.php
  </code></pre>
  
  <p>In some cases, even with Pavel's command:</p>
  
  <pre><code>"create_a_file_and_save.php" E212: Can't open file for writing
  </code></pre>