gnome: whitespace cleanup

gnome/src/accountlist.h

@@ -29,8 +29,8 @@
  *  as that of the covered work.
  */
 
-#ifndef ACCOUNTLIST_H__
-#define ACCOUNTLIST_H__
+#ifndef ACCOUNTLIST_H_
+#define ACCOUNTLIST_H_
 
 #include <gtk/gtk.h>
 /** @file accountlist.h
@@ -197,4 +197,4 @@ void account_insert(account_t *account, const gchar *key, const gchar *value);
 gpointer account_lookup(const account_t *account, gconstpointer key);
 void account_list_remove(const gchar *accountID);
 
-#endif
+#endif  // ACCOUNTLIST_H_