[gnome-themes-extra] Improve the wording of the dummy CSS files

[Juraj Fiala <jurf src gnome org>]

commit 537da70b74ddc92f9bca8080941d2385b387aac6
Author: Juraj Fiala <jurf riseup net>
Date:   Wed Jan 24 21:05:16 2018 +0100

    Improve the wording of the dummy CSS files

 themes/Adwaita/gtk-3.0/gtk.css      | 2 +-
 themes/HighContrast/gtk-3.0/gtk.css | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk.css b/themes/Adwaita/gtk-3.0/gtk.css
index b7edf20b..9aa2618e 100644
--- a/themes/Adwaita/gtk-3.0/gtk.css
+++ b/themes/Adwaita/gtk-3.0/gtk.css
@@ -1 +1 @@
-/* Adwaita is the default theme of GTK+ 3, this file is not used */
+/* Adwaita is now part of GTK+ 3, this file is no longer used */
diff --git a/themes/HighContrast/gtk-3.0/gtk.css b/themes/HighContrast/gtk-3.0/gtk.css
index 62d20a5e..495a34d2 100644
--- a/themes/HighContrast/gtk-3.0/gtk.css
+++ b/themes/HighContrast/gtk-3.0/gtk.css
@@ -1 +1 @@
-/* HighCOntrast is part of Gtk 3.14, this file is no longer used */
+/* HighContrast is now part of GTK+ 3, this file is no longer used */