; Improve documentation of TAB/SPC indentation

* lisp/indent.el (tab-to-tab-stop):
* src/indent.c (Findent_to): Mention 'indent-tabs-mode' in doc
strings.

lisp/indent.el

@@ -784,7 +784,8 @@ If PREV is non-nil, return the previous one instead."
 (defun tab-to-tab-stop ()
   "Insert spaces or tabs to next defined tab-stop column.
 The variable `tab-stop-list' is a list of columns at which there are tab stops.
-Use \\[edit-tab-stops] to edit them interactively."
+Use \\[edit-tab-stops] to edit them interactively.
+Whether this inserts tabs or spaces depends on `indent-tabs-mode'."
   (interactive)
   (and abbrev-mode (= (char-syntax (preceding-char)) ?w)
        (expand-abbrev))

src/indent.c

@@ -887,6 +887,8 @@ DEFUN ("indent-to", Findent_to, Sindent_to, 1, 2, "NIndent to column: ",
 Optional second argument MINIMUM says always do at least MINIMUM spaces
 even if that goes past COLUMN; by default, MINIMUM is zero.
 
+Whether this uses tabs or spaces depends on `indent-tabs-mode'.
+
 The return value is the column where the insertion ends.  */)
   (Lisp_Object column, Lisp_Object minimum)
 {