Add new symbols to docs

Also, minor formatting fixes.

docs/reference/gdk/gdk3-sections.txt

@@ -172,7 +172,6 @@ GdkDisplayClass
 <TITLE>GdkDisplayManager</TITLE>
 GdkDisplayManager
 gdk_display_manager_get
-gdk_display_manager_peek
 gdk_display_manager_get_default_display
 gdk_display_manager_set_default_display
 gdk_display_manager_list_displays
@@ -460,6 +459,7 @@ GdkModifierType
 gdk_window_get_parent
 gdk_window_get_toplevel
 gdk_window_get_children
+gdk_window_get_children_with_user_data
 gdk_window_peek_children
 gdk_window_get_events
 gdk_window_set_events

gdk/gdkwindow.c

@@ -2421,6 +2421,7 @@ gdk_window_peek_children (GdkWindow *window)
 /**
  * gdk_window_get_children_with_user_data:
  * @window: a #GdkWindow
+ * @user_data: 
  *
  * Gets the list of children of @window known to GDK with a particular
  * user_data set on it.
@@ -2433,9 +2434,12 @@ gdk_window_peek_children (GdkWindow *window)
  *
  * Return value: (transfer container) (element-type GdkWindow):
  *     list of child windows inside @window
+ *
+ * Since: 3.10
  **/
 GList *
-gdk_window_get_children_with_user_data (GdkWindow *window, gpointer user_data)
+gdk_window_get_children_with_user_data (GdkWindow *window,
+                                        gpointer   user_data)
 {
   GdkWindow *child;
   GList *res, *l;
@@ -3755,8 +3759,8 @@ gdk_window_invalidate_rect (GdkWindow          *window,
  * Since: 3.10
  **/
 void
-gdk_window_set_invalidate_handler (GdkWindow *window,
-				   GdkWindowInvalidateHandlerFunc handler)
+gdk_window_set_invalidate_handler (GdkWindow                      *window,
+				   GdkWindowInvalidateHandlerFunc  handler)
 {
   window->invalidate_handler = handler;
 }

gdk/gdkwindow.h

@@ -693,11 +693,11 @@ gboolean gdk_window_set_static_gravities (GdkWindow *window,
  *
  * Since: 3.10
  */
-typedef void (*GdkWindowInvalidateHandlerFunc)  (GdkWindow *window,
+typedef void (*GdkWindowInvalidateHandlerFunc)  (GdkWindow      *window,
 						 cairo_region_t *region);
 GDK_AVAILABLE_IN_3_10
-void gdk_window_set_invalidate_handler (GdkWindow *window,
-					GdkWindowInvalidateHandlerFunc handler);
+void gdk_window_set_invalidate_handler (GdkWindow                      *window,
+					GdkWindowInvalidateHandlerFunc  handler);
 
 GDK_AVAILABLE_IN_ALL
 gboolean      gdk_window_has_native         (GdkWindow       *window);
@@ -858,7 +858,7 @@ GDK_AVAILABLE_IN_ALL
 GList *       gdk_window_peek_children   (GdkWindow       *window);
 GDK_AVAILABLE_IN_3_10
 GList *       gdk_window_get_children_with_user_data (GdkWindow *window,
-						      gpointer user_data);
+						      gpointer   user_data);
 
 GDK_AVAILABLE_IN_ALL
 GdkEventMask  gdk_window_get_events	 (GdkWindow	  *window);