Tidy up documentation associated with window groups.

* doc/lispref/windows.texi (Basic Windows): Add an @anchor for "Window
Groups".  Correct example function to `window-group-start'.
(Window Start and End, Textual scrolling): Point to the new anchor.  State
that (most of) the args in window group functions have the same meaning as for
the corresponding window primitives.

* doc/lispref/positions.texi (Screen Lines).  Same as above.

1 files changed, 4 insertions, 5 deletions

diff --git a/doc/lispref/positions.texi b/doc/lispref/positions.texi
index 090eb4598a8..9daf5cef059 100644
--- a/doc/lispref/positions.texi
+++ b/doc/lispref/positions.texi
@@ -575,14 +575,13 @@ the top line in the window numbered 0.
 @vindex move-to-window-group-line-function
 @defun move-to-window-group-line count
 This function is like @code{move-to-window-line}, except that when the
-selected window is a part of a group of windows (@pxref{Basic
-Windows}), @code{move-to-window-group-line} will move to a position
-with respect to the entire group, not just the single window.  This
+selected window is a part of a group of windows (@pxref{Window
+Group}), @code{move-to-window-group-line} will move to a position with
+respect to the entire group, not just the single window.  This
 condition holds when the buffer local variable
 @code{move-to-window-group-line-function} is set to a function.  In
 this case, @code{move-to-window-group-line} calls the function with
-the argument @var{count}, then returns its result.  The argument has
-the same meaning as in @code{move-to-window-line}.
+the argument @var{count}, then returns its result.
 @end defun
 
 @defun compute-motion from frompos to topos width offsets window