Properly format the property name, and avoid saying scale so many times.
* @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