(ess-indent-or-complete : directly explain meaning of ess-tab-complet…

…e-in-script.

git-svn-id: https://svn.r-project.org/ESS/trunk@4774 0bbaf3bd-34e0-0310-bf65-c717079852d4

lisp/ess-mode.el

@@ -853,7 +853,8 @@ of the expression are preserved."
   "Try to indent first, if code is already properly indented, complete instead.
 It calls `comint-dynamic-complete' for emacs < 24 and `completion-at-point' otherwise.
 
-See also `ess-tab-complete-in-script' and `ess-first-tab-never-complete'."
+In ess-mode, only tries completion if `ess-tab-complete-in-script' is non-nil.
+See also `ess-first-tab-never-complete'."
   (interactive)
   (let ((shift (ess-indent-command)))
     (when (and ess-tab-complete-in-script