title: What are those vertical lines in Notepad++ called? The ones that light up for matching brackets or tags, etc
body: <p>I'd like an actual term for them. Tab lines?</p>
  
  <p>I can't find a reference to them on google because i don't know what to search for!</p>
  
  <p>I wanna see if there's something like this for Gedit.</p>