Note [Turtles]
~~~~~~~~~~~~~~~
This is note 1. See Note [Wombats are toes].

/* Note [Wombats are toes]
   ~~~~~~~~~~~~~~~~~~~~~~~
   This is another Note.
 */

See Note [This is a
Note reference broken across lines].

  // This is another Note [Broken
  // across a line in a C++ comment].
  
  /*
   * This is another Note [Broken
   * across a line in a C comment].
   */
  
  -- This is another Note [Broken
  -- across a line in a Haskell comment].
  
  # This is another Note [Broken
  # across a line in a Python comment].