[gtk+] Scale: Improve documentation of set_has_origin()

[Daniel Boles <dboles src gnome org>]

commit e0a741c8ee76b674d6d1cefb60e1e31deeadfbd8
Author: Daniel Boles <dboles src gnome org>
Date:   Tue May 2 12:22:20 2017 +0100

    Scale: Improve documentation of set_has_origin()
    
    Properly format the property name, and avoid saying scale so many times.

 gtk/gtkscale.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index b35dd5e..b760356 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -1345,9 +1345,8 @@ gtk_scale_get_draw_value (GtkScale *scale)
  * @scale: a #GtkScale
  * @has_origin: %TRUE if the scale has an origin
  * 
- * If @has_origin is set to %TRUE (the default),
- * the scale will highlight the part of the scale
- * between the origin (bottom or left side) of the scale
+ * If #GtkScale:has-origin is set to %TRUE (the default), the scale will
+ * highlight the part of the trough between the origin (bottom or left side)
  * and the current value.
  *
  * Since: 3.4