diff --git a/src/rulesdialog.c b/src/rulesdialog.c
index 82b6a2f..1b69a1a 100644
--- a/src/rulesdialog.c
+++ b/src/rulesdialog.c
@@ -15,81 +15,86 @@
 #include "game.h"        /* rules stuff */
 
 struct _gtkb_rules_dialog {
-  	GtkWidget *xrange, *yrange, *crange, *nrange, *drange;
+   GtkWidget *xrange, *yrange, *crange, *nrange, *drange;
 };
 
 struct _gtkb_rules_dialog _rd;
 
-void rules_ok(GtkWidget *widget, gpointer data) {
-        gint oldnext = rules_get_next();
-        gchar *msg;
+void rules_ok(GtkWidget *widget, gpointer data)
+{
+   gint oldnext = rules_get_next();
+   gchar *msg;
 
-        rules_set_width(gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.xrange)));
-        rules_set_height(gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.yrange)));
-        rules_set_colors(gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.crange)));
-        rules_set_next(gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.nrange)));
-        rules_set_destroy(gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.drange)));
+   rules_set_width (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.xrange)));
+   rules_set_height (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.yrange)));
+   rules_set_colors (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.crange)));
+   rules_set_next (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.nrange)));
+   rules_set_destroy (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(_rd.drange)));
 
-	reinit_board(NULL, NULL, 0, oldnext);
+   reinit_board (NULL, NULL, 0, oldnext);
 
-  	if(data) {
-      		gtk_widget_destroy(GTK_WIDGET(data));
-  	}
-        msg = save_preferences();
-        if(msg) {
-        	ut_simple_message_box(msg);
-                g_free(msg);
-        }
+   if(data) {
+      gtk_widget_destroy (GTK_WIDGET(data));
+   }
+   msg = save_preferences ();
+   if(msg) {
+      ut_simple_message_box (msg);
+      g_free (msg);
+   }
 }
 
-void rules_classic(void) {
-	gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.xrange), rules_get_classic_width());
-	gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.yrange), rules_get_classic_height());
-	gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.crange), rules_get_classic_colors());
-	gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.nrange), rules_get_classic_next());
-	gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.drange), rules_get_classic_destroy());
+
+void rules_classic(void)
+{
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.xrange), rules_get_classic_width());
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.yrange), rules_get_classic_height());
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.crange), rules_get_classic_colors());
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.nrange), rules_get_classic_next());
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(_rd.drange), rules_get_classic_destroy());
 }
 
-void rules_dialog(void) {
-  	GtkWidget *dialog;
-  	GtkWidget *frame;
-  	GtkWidget *big_vbox, *vbox, *buttons_box;
-  	GtkWidget *separator;
-  	GtkWidget *ok_button, *cancel_button, *classic_button;
+
+void rules_dialog (void)
+{
+   GtkWidget * dialog;
+   GtkWidget * frame;
+   GtkWidget * big_vbox, * vbox, * buttons_box;
+   GtkWidget * separator;
+   GtkWidget * ok_button, * cancel_button, * classic_button;
 
 
-	dialog = ut_window_new(_("Game rules"), "GtkBalls_Rules", "GtkBalls", TRUE, TRUE, TRUE, 5);
+   dialog = ut_window_new(_("Game rules"), "GtkBalls_Rules", "GtkBalls", TRUE, TRUE, TRUE, 5);
 
-  	big_vbox = gtk_vbox_new(FALSE, 5);
-  	gtk_container_add(GTK_CONTAINER(dialog), big_vbox);
+   big_vbox = gtk_vbox_new (FALSE, 5);
+   gtk_container_add (GTK_CONTAINER(dialog), big_vbox);
 
-  	frame = gtk_frame_new(_("Game rules"));
-  	gtk_box_pack_start(GTK_BOX(big_vbox), frame, FALSE, FALSE, 0);
+   frame = gtk_frame_new (_("Game rules"));
+   gtk_box_pack_start (GTK_BOX(big_vbox), frame, FALSE, FALSE, 0);
 
-	vbox = gtk_vbox_new(FALSE, 0);
-	gtk_container_set_border_width(GTK_CONTAINER(vbox), 5);
-  	gtk_container_add(GTK_CONTAINER(frame), vbox);
+   vbox = gtk_vbox_new (FALSE, 0);
+   gtk_container_set_border_width (GTK_CONTAINER(vbox), 5);
+   gtk_container_add (GTK_CONTAINER(frame), vbox);
 
-	_rd.xrange = ut_spin_button_new(_("Board width"), 4, 99, rules_get_width(), vbox);
-	_rd.yrange = ut_spin_button_new(_("Board height"), 4, 99, rules_get_height(), vbox);
-	_rd.crange = ut_spin_button_new(_("Number of different objects"),
-                                        3, gtkb_theme_get_balls_num(), rules_get_colors(), vbox);
-	_rd.nrange = ut_spin_button_new(_("Number of 'next' objects"), 2, 99, rules_get_next(), vbox);
-	_rd.drange = ut_spin_button_new(_("How many balls at line eliminate it"),
-                                        3, 99, rules_get_destroy(), vbox);
+   _rd.xrange = ut_spin_button_new (_("Board width"), 4, 99, rules_get_width(), vbox);
+   _rd.yrange = ut_spin_button_new (_("Board height"), 4, 99, rules_get_height(), vbox);
+   _rd.crange = ut_spin_button_new (_("Number of different objects"),
+                                    3, gtkb_theme_get_balls_num(), rules_get_colors(), vbox);
+   _rd.nrange = ut_spin_button_new (_("Number of 'next' objects"), 2, 99, rules_get_next(), vbox);
+   _rd.drange = ut_spin_button_new (_("How many balls at line eliminate it"),
+                                    3, 99, rules_get_destroy(), vbox);
 
-	classic_button = ut_button_new(_("Classic rules"), rules_classic, dialog, big_vbox);
+   classic_button = ut_button_new (_("Classic rules"), rules_classic, dialog, big_vbox);
 
-  	separator = gtk_hseparator_new();
-  	gtk_box_pack_start(GTK_BOX(big_vbox), separator, FALSE, FALSE, 5);
+   separator = gtk_hseparator_new ();
+   gtk_box_pack_start (GTK_BOX(big_vbox), separator, FALSE, FALSE, 5);
 
-  	buttons_box = gtk_hbutton_box_new();
-        gtk_button_box_set_layout(GTK_BUTTON_BOX(buttons_box), GTK_BUTTONBOX_SPREAD);
-  	gtk_box_pack_start(GTK_BOX(big_vbox), buttons_box, TRUE, TRUE, 0);
+   buttons_box = gtk_hbutton_box_new ();
+   gtk_button_box_set_layout (GTK_BUTTON_BOX(buttons_box), GTK_BUTTONBOX_SPREAD);
+   gtk_box_pack_start (GTK_BOX(big_vbox), buttons_box, TRUE, TRUE, 0);
 
-        ok_button = ut_button_new_stock(GTK_STOCK_OK, rules_ok, dialog, buttons_box);
-        cancel_button = ut_button_new_stock_swap(GTK_STOCK_CANCEL, gtk_widget_destroy, dialog, buttons_box);
+   ok_button = ut_button_new_stock (GTK_STOCK_OK, rules_ok, dialog, buttons_box);
+   cancel_button = ut_button_new_stock_swap (GTK_STOCK_CANCEL, gtk_widget_destroy, dialog, buttons_box);
 
-        gtk_widget_grab_default(ok_button);
-  	gtk_widget_show_all(dialog);
+   gtk_widget_grab_default (ok_button);
+   gtk_widget_show_all (dialog);
 }