gtk-demo: Use title case consistently

demos/gtk-demo/application.c

@@ -1,4 +1,4 @@
-/* Application class
+/* Application Class
  *
  * Demonstrates a simple application.
  *

demos/gtk-demo/combobox.c

@@ -1,7 +1,7 @@
-/* Combo boxes
+/* Combo Boxes
  *
- * The ComboBox widget allows to select one option out of a list.
- * The ComboBoxEntry additionally allows the user to enter a value
+ * The GtkComboBox widget allows to select one option out of a list.
+ * The GtkComboBoxEntry additionally allows the user to enter a value
  * that is not in the list of options.
  *
  * How the options are displayed is controlled by cell renderers.

demos/gtk-demo/event_axes.c

@@ -1,4 +1,4 @@
-/* Event axes
+/* Event Axes
  *
  * Demonstrates advanced handling of event information from exotic
  * input devices.

demos/gtk-demo/offscreen_window.c

@@ -1,4 +1,4 @@
-/* Offscreen windows/Rotated button
+/* Offscreen Windows/Rotated Button
  *
  * Offscreen windows can be used to transform parts of a widget
  * hierarchy. Note that the rotated button is fully functional.

demos/gtk-demo/offscreen_window2.c

@@ -1,4 +1,4 @@
-/* Offscreen windows/Effects
+/* Offscreen Windows/Effects
  *
  * Offscreen windows can be used to render elements multiple times to achieve
  * various effects.

demos/gtk-demo/textscroll.c

@@ -1,4 +1,4 @@
-/* Text Widget/Automatic scrolling
+/* Text Widget/Automatic Scrolling
  *
  * This example demonstrates how to use the gravity of
  * GtkTextMarks to keep a text view scrolled to the bottom

demos/gtk-demo/transparent.c

@@ -1,4 +1,4 @@
-/* Transparent
+/* Transparency
  *
  * Use transparent background on GdkWindows to create a shadow effect on a GtkOverlay widget.
  */