*: make GNU licensing statement forms more regular

This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/applets/individual.c b/applets/individual.c
index 341f4d1..1e74e4c 100644
--- a/applets/individual.c
+++ b/applets/individual.c
@@ -2,7 +2,7 @@
  *
  * Copyright 2005 Rob Landley <rob@landley.net
  *
- * Licensed under GPL version 2, see file LICENSE in this tarball for details
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
 const char *applet_name;