[libadwaita/wip/exalm/dark: 5/9] application: Remove gtk-application-prefer-dark-theme mentions from docs

[Alexander Mikhaylenko <alexm src gnome org>]

commit cbc700c6284a94c01a79e78b34bbd5dec01c1a67
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Sep 22 14:20:58 2021 +0500

    application: Remove gtk-application-prefer-dark-theme mentions from docs
    
    People should use AdwStyleManager properties instead.

 src/adw-application.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/src/adw-application.c b/src/adw-application.c
index f19dc655..f422ad9a 100644
--- a/src/adw-application.c
+++ b/src/adw-application.c
@@ -32,14 +32,13 @@
  * - `style.css` contains styles that are always present.
  *
  * - `style-dark.css` contains styles only used when
- *   [property@Gtk.Settings:gtk-application-prefer-dark-theme] is set to `TRUE`.
+ *   [property@Adw.StyleManager:dark] is `TRUE`.
  *
  * - `style-hc.css` contains styles used when the system high contrast
  *   preference is enabled.
  *
  * - `style-hc-dark.css` contains styles used when the system high contrast
- *   preference is enabled and
- *   [property@Gtk.Settings:gtk-application-prefer-dark-theme] is set to `TRUE`.
+ *   preference is enabled and [property@Adw.StyleManager:dark] is `TRUE`.
  *
  * Since: 1.0
  */