master ef6df9e 1/3: Improve docstring of 'frame-scale-factor'

[Robert Pluim]

branch: master
commit ef6df9ec8f7f4a5d7ab15f21e870ba21f99872d5
Author: Robert Pluim <rpluim@gmail.com>
Commit: Robert Pluim <rpluim@gmail.com>

    Improve docstring of 'frame-scale-factor'
    
    * src/frame.c (Fframe_scale_factor): Explain what happens when the
    FRAME argument is nil.
---
 src/frame.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/frame.c b/src/frame.c
index bbdc3b5..028a45a 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -3747,6 +3747,7 @@ window state change flag is reset.  */)
 DEFUN ("frame-scale-factor", Fframe_scale_factor, Sframe_scale_factor,
        0, 1, 0,
        doc: /* Return FRAMEs scale factor.
+If FRAME is omitted or nil, the selected frame is used.
 The scale factor is the amount by which a logical pixel size must be
 multiplied to find the real number of pixels.  */)
      (Lisp_Object frame)