title: Using sed replace line in file with another file
body: <p>I have a very large tab delimited file, I would like to replace a single line in this file with another. As the line has >100 columns, a simple sed 's/find/replace/' is not desirable. My newline is stored in file newline.txt</p>
  
  <p>How do I achieve:</p>
  
  <pre><code>sed 's/find/newline.txt/' infile
  </code></pre>