Convert copyright years to all use 4 digit years.

Vincent Lefèvre pointed out the common shortcut, e.g 1996-9, is
actually not allowed for copyright years.  Convert all the copyright
years (for mutt files) to use 4 digits.

1 files changed, 1 insertions, 1 deletions

diff --git a/pgp.h b/pgp.h
index 9b2a09e6..6f925068 100644
--- a/pgp.h
+++ b/pgp.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1996,1997 Michael R. Elkins <me@mutt.org>
+ * Copyright (C) 1996-1997 Michael R. Elkins <me@mutt.org>
  * Copyright (C) 1999-2003 Thomas Roessler <roessler@does-not-exist.org>
  * Copyright (C) 2004 g10 Code GmbH
  *