title: How do I append lines from one file to the end of each line of another file?
body: <p>Suppose I have two files:</p>
  
  <pre>
  cat
  dog
  baboon
  </pre>
  
  <pre>
  feline
  canine
  primate
  </pre>
  
  <p>I want to append the lines from one file at the end of another file after adding a space. I know a way to do this using a for loop in bash, but I think there is a single command that can do this sort of thing, and I just can't remember it.</p>
  
  <p>The output should look like:</p>
  
  <pre>
  cat feline
  dog canine
  baboon primate
  </pre>