title: Arrange order "run_1" followed by "run_2" instead of "run_11"
body: <p>I have a tibble like below.</p>
  
  <pre><code>test &lt;- tibble(run = c("run_1","run_2", "run_3", "run_11", "run_111", "run_4"))
  
  test %&gt;% arrange(run)
  </code></pre>
  
  <p>gives me </p>
  
  <pre><code>1   run_1
  2  run_11
  3 run_111
  4   run_2
  5   run_3
  6   run_4
  </code></pre>
  
  <p>but I want</p>
  
  <pre><code>1  run_1
  2  run_2
  3  run_3
  4  run_4
  5  run_11
  6  run_111
  </code></pre>
  
  <p>Any way to solve it?</p>