1. Column A | Column B
  2. :--|:--
  3. Stuff goes here | More stuff here
  4. Even more stuff | Okay that's enough
  5.  
  6. Edited for more options:
  7.  
  8. You can make the text alignment different by changing the ":--":
  9.  
  10. Left | Center | Right
  11. :--|:--:|--:
  12. This is | This is | This is
  13. Left aligned. | Center aligned. | Right aligned.
  14.  
  15. So, ":--" is left, ":--:" is center, and "--:" is right.