[ESS] problems with help in the development version

[Vitalie Spinu]

Switch-to-buffer in Emacs 23 doesn't have the force argument. Hm ... we
will have to correct that.

 >>> Rodney Sparapani on Thu, 19 Sep 2013 14:33:05 -0500 wrote:

 > On 09/19/2013 02:03 PM, Ross Boylan wrote:
 >> Here's the trace
 >> Debugger entered--Lisp error: (wrong-number-of-arguments switch-to-buffer 3)
 >> (switch-to-buffer buff nil (quote force))

 > This doesn't make sense to me.  This must be coming from line 551
 > of ess-help.el: (switch-to-buffer buff nil 'force)

 > But, that is a totally valid use of switch-to-buffer.  It is either
 > an emacs bug or a problem with your installation...

 > switch-to-buffer is an interactive compiled Lisp function in
 > `window.el'.

 > It is bound to C-x b, <menu-bar> <buffer> <select-named-buffer>.

 > (switch-to-buffer BUFFER-OR-NAME &optional NORECORD FORCE-SAME-WINDOW)

 > Display buffer BUFFER-OR-NAME in the selected window.

 > WARNING: This is NOT the way to work on another buffer temporarily
 > within a Lisp program!  Use `set-buffer' instead.  That avoids
 > messing with the window-buffer correspondences.

 > If the selected window cannot display the specified
 > buffer (e.g. if it is a minibuffer window or strongly dedicated
 > to another buffer), call `pop-to-buffer' to select the buffer in
 > another window.

 > If called interactively, read the buffer name using the
 > minibuffer.  The variable `confirm-nonexistent-file-or-buffer'
 > determines whether to request confirmation before creating a new
 > buffer.

 > BUFFER-OR-NAME may be a buffer, a string (a buffer name), or nil.
 > If BUFFER-OR-NAME is a string that does not identify an existing
 > buffer, create a buffer with that name.  If BUFFER-OR-NAME is
 > nil, switch to the buffer returned by `other-buffer'.

 > If optional argument NORECORD is non-nil, do not put the buffer
 > at the front of the buffer list, and do not make the window
 > displaying it the most recently selected one.

 > If optional argument FORCE-SAME-WINDOW is non-nil, the buffer
 > must be displayed in the selected window; if that is impossible,
 > signal an error rather than calling `pop-to-buffer'.

 > The option `switch-to-buffer-preserve-window-point' can be used
 > to make the buffer appear at its last position in the selected
 > window.

 > Return the buffer switched to.