RE: gutter region on both sides of screen

[Drew Adams]

> Maybe "M-x set-fringe-style none" was implemented when 21.3 came out.

Nope. 

> This is probably the simplest way:
>     (push '(continuation nil nil) fringe-indicator-alist)
> This version modifies the alist in-place:
>     (setcdr (assq 'continuation fringe-indicator-alist)
>             '(nil nil))

There is no `fringe-indicator-alist' in Emacs 21.

In Emacs 21, there are no variables or functions with `fringe' in their name.