bug#67669: 29.1; Drop text suggesting using `and' to replace `if'

[Eli Zaretskii <eliz@gnu.org>]

> From: Xiyue Deng <manphiz@gmail.com>
> Date: Wed, 06 Dec 2023 13:47:02 -0800
> 
> 
> In section "the `kill-new' function" - the third last paragraph to be
> precise - there are some texts in parentheses that discusses potentially
> using an `and' to replace the `if' statement being discussed.  It looks
> like to be referring to an earlier version of the code example[1] before
> using the version from Emacs 22.  Meanwhile, it looks like relying on
> the side effect of `and' to emulate an `if' may not be a good idea
> nowadays.  So is it OK to drop this advice?

AFAIU, the relevant fragment is:

     The expression looks like this:

	 (if interprogram-cut-function
	     (funcall interprogram-cut-function string (not replace))))

     If an ‘interprogram-cut-function’ exists, then Emacs executes
  ‘funcall’, which in turn calls its first argument as a function and
  passes the remaining arguments to it.  (Incidentally, as far as I can
  see, this ‘if’ expression could be replaced by an ‘and’ expression
  similar to the one in the first part of the function.)

I don't see anything wrong here.  Can you elaborate on why you think
the text in parentheses is inaccurate or incorrect or unclear?

Thanks.