anchor.diff:  #   (n) Next
   #   (e) Exit
   # [?] Enter menu selection:
  +--------
  +
  +Your menus can do cool stuff by registering functions:
  +
  +[source,python]
  +--------
  +def foo(a, b):
  +    print(a + b)
  +menu.add("f", "foo", foo, [1, 2])
   --------
   
   Some print-like functions:
  
positive.code: # [?] Enter the following letters, "dkixzp":
  --------
  
  Here is a basic menu:
  
  [source,python]
  --------
  
negative.code: import qprompt
  --------
  
  You can prompt the user for various input types:
  
  [source,python]
  --------
  qprompt.ask_yesno()
  qprompt.ask_int()
  qprompt.ask_float()
  qprompt.ask_str()
  --------
  
  All prompts requiring user input will start with `[?]`:
  
  [source,python]
  --------
  qprompt.ask_int()
  # [?] Enter an integer:
  --------
  
  At any prompt, the user can enter the `?` character to show valid entries:
  