title: Emacs highlights every new character I type (Common Lisp with Slime)
body: <p>I'm new to Emacs and I use it to code in Common Lisp with Slime. Everything was ok but this morning when I tried to edit a lisp file it highlights every visible character I type for no reason (but not the white spaces.) When I save the file, quit Emacs and restart it, the text is not highlighted but, again, every new character I type is. It just happens to lisp files so I suspect Slime to cause that but it never did that before.</p>
  
  <p><a href="https://i.stack.imgur.com/9qcGC.png" rel="nofollow noreferrer">example of the problem</a></p>
  
  <p>Here "(def" was saved in the file and the rest is what I typed after reloading Emacs.</p>
  
  <p>Thanks for your help :)</p>
  
  <p><strong>Edit:</strong></p>
  
  <p><code>C-u C-x =</code> gives <a href="https://i.stack.imgur.com/vHrMy.png" rel="nofollow noreferrer">c-u c-x =</a></p>