diff --git a/hawk/lib/arr.c b/hawk/lib/arr.c
index de3adf0e..310f2adb 100644
--- a/hawk/lib/arr.c
+++ b/hawk/lib/arr.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/chr.c b/hawk/lib/chr.c
index a669bf24..c2d4c6aa 100644
--- a/hawk/lib/chr.c
+++ b/hawk/lib/chr.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/cli-imp.h b/hawk/lib/cli-imp.h
index 23065013..d4f96be7 100644
--- a/hawk/lib/cli-imp.h
+++ b/hawk/lib/cli-imp.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/cli.c b/hawk/lib/cli.c
index 43c2a56e..3a0853f7 100644
--- a/hawk/lib/cli.c
+++ b/hawk/lib/cli.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/dir.c b/hawk/lib/dir.c
index 5c4407a9..f8d7309b 100644
--- a/hawk/lib/dir.c
+++ b/hawk/lib/dir.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/ecs-imp.h b/hawk/lib/ecs-imp.h
index 2d22f522..853bb71e 100644
--- a/hawk/lib/ecs-imp.h
+++ b/hawk/lib/ecs-imp.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/ecs.c b/hawk/lib/ecs.c
index f911f8b0..d5bd6dec 100644
--- a/hawk/lib/ecs.c
+++ b/hawk/lib/ecs.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/err-prv.h b/hawk/lib/err-prv.h
index 7b378f62..aa00176a 100644
--- a/hawk/lib/err-prv.h
+++ b/hawk/lib/err-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/err-sys.c b/hawk/lib/err-sys.c
index 961f0f49..ff941c45 100644
--- a/hawk/lib/err-sys.c
+++ b/hawk/lib/err-sys.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/err.c b/hawk/lib/err.c
index 2d7d4e72..81c40fc9 100644
--- a/hawk/lib/err.c
+++ b/hawk/lib/err.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/fio.c b/hawk/lib/fio.c
index 40d9fa7e..3358f2d2 100644
--- a/hawk/lib/fio.c
+++ b/hawk/lib/fio.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/fmt-imp.h b/hawk/lib/fmt-imp.h
index 08995d8b..7323152f 100644
--- a/hawk/lib/fmt-imp.h
+++ b/hawk/lib/fmt-imp.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/fmt.c b/hawk/lib/fmt.c
index a3ca5493..3ea83672 100644
--- a/hawk/lib/fmt.c
+++ b/hawk/lib/fmt.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/fnc-prv.h b/hawk/lib/fnc-prv.h
index 1d036377..c629db61 100644
--- a/hawk/lib/fnc-prv.h
+++ b/hawk/lib/fnc-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/fnc.c b/hawk/lib/fnc.c
index 856c9e69..d9fedff0 100644
--- a/hawk/lib/fnc.c
+++ b/hawk/lib/fnc.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/gem-nwif.c b/hawk/lib/gem-nwif.c
index 9cd503a0..a48861c0 100644
--- a/hawk/lib/gem-nwif.c
+++ b/hawk/lib/gem-nwif.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/gem-nwif2.c b/hawk/lib/gem-nwif2.c
index 60deb67f..926c888c 100644
--- a/hawk/lib/gem-nwif2.c
+++ b/hawk/lib/gem-nwif2.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/gem.c b/hawk/lib/gem.c
index 79e63c4a..95030dbd 100644
--- a/hawk/lib/gem.c
+++ b/hawk/lib/gem.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-arr.h b/hawk/lib/hawk-arr.h
index a9bfe962..3b2f41cf 100644
--- a/hawk/lib/hawk-arr.h
+++ b/hawk/lib/hawk-arr.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-chr.h b/hawk/lib/hawk-chr.h
index eab266b6..43bfefff 100644
--- a/hawk/lib/hawk-chr.h
+++ b/hawk/lib/hawk-chr.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-cli.h b/hawk/lib/hawk-cli.h
index 2d4b5dfc..e4e14ad0 100644
--- a/hawk/lib/hawk-cli.h
+++ b/hawk/lib/hawk-cli.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-cmn.h b/hawk/lib/hawk-cmn.h
index e0f67c3e..185eb1c0 100644
--- a/hawk/lib/hawk-cmn.h
+++ b/hawk/lib/hawk-cmn.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-dir.h b/hawk/lib/hawk-dir.h
index 9de524f0..36050540 100644
--- a/hawk/lib/hawk-dir.h
+++ b/hawk/lib/hawk-dir.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-ecs.h b/hawk/lib/hawk-ecs.h
index d3756d2e..06b4953e 100644
--- a/hawk/lib/hawk-ecs.h
+++ b/hawk/lib/hawk-ecs.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-fio.h b/hawk/lib/hawk-fio.h
index 455f65a2..ac831d2c 100644
--- a/hawk/lib/hawk-fio.h
+++ b/hawk/lib/hawk-fio.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-fmt.h b/hawk/lib/hawk-fmt.h
index 8241e8ef..bf3d9554 100644
--- a/hawk/lib/hawk-fmt.h
+++ b/hawk/lib/hawk-fmt.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-gem.h b/hawk/lib/hawk-gem.h
index ed24cdc5..501af1be 100644
--- a/hawk/lib/hawk-gem.h
+++ b/hawk/lib/hawk-gem.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-htb.h b/hawk/lib/hawk-htb.h
index 18da4b3d..7021d431 100644
--- a/hawk/lib/hawk-htb.h
+++ b/hawk/lib/hawk-htb.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-map.h b/hawk/lib/hawk-map.h
index f51d6882..3806f1ef 100644
--- a/hawk/lib/hawk-map.h
+++ b/hawk/lib/hawk-map.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-mtx.h b/hawk/lib/hawk-mtx.h
index b329d31d..1b61101b 100644
--- a/hawk/lib/hawk-mtx.h
+++ b/hawk/lib/hawk-mtx.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-pac1.h b/hawk/lib/hawk-pac1.h
index 6a772b03..8430a690 100644
--- a/hawk/lib/hawk-pac1.h
+++ b/hawk/lib/hawk-pac1.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-pio.h b/hawk/lib/hawk-pio.h
index 1ab604c3..ec761bde 100644
--- a/hawk/lib/hawk-pio.h
+++ b/hawk/lib/hawk-pio.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-prv.h b/hawk/lib/hawk-prv.h
index fdd1f5c6..45fb2cf7 100644
--- a/hawk/lib/hawk-prv.h
+++ b/hawk/lib/hawk-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-rbt.h b/hawk/lib/hawk-rbt.h
index 2612aafb..d3dbb2a4 100644
--- a/hawk/lib/hawk-rbt.h
+++ b/hawk/lib/hawk-rbt.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-sed.h b/hawk/lib/hawk-sed.h
index fb26ce1f..9e348e7a 100644
--- a/hawk/lib/hawk-sed.h
+++ b/hawk/lib/hawk-sed.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-sio.h b/hawk/lib/hawk-sio.h
index 6b3d35b6..38a1b1b9 100644
--- a/hawk/lib/hawk-sio.h
+++ b/hawk/lib/hawk-sio.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-skad.h b/hawk/lib/hawk-skad.h
index d267b6e9..f9056a8e 100644
--- a/hawk/lib/hawk-skad.h
+++ b/hawk/lib/hawk-skad.h
@@ -1,6 +1,4 @@
 /*
-    Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
-
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:
diff --git a/hawk/lib/hawk-std.h b/hawk/lib/hawk-std.h
index 3b7b1559..b15347fb 100644
--- a/hawk/lib/hawk-std.h
+++ b/hawk/lib/hawk-std.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-tio.h b/hawk/lib/hawk-tio.h
index 60bffe09..8b704a6c 100644
--- a/hawk/lib/hawk-tio.h
+++ b/hawk/lib/hawk-tio.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-tre.h b/hawk/lib/hawk-tre.h
index b8721a9a..ee9c5f27 100644
--- a/hawk/lib/hawk-tre.h
+++ b/hawk/lib/hawk-tre.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-upac.h b/hawk/lib/hawk-upac.h
index a96d9f99..3c7f3d11 100644
--- a/hawk/lib/hawk-upac.h
+++ b/hawk/lib/hawk-upac.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-utl.h b/hawk/lib/hawk-utl.h
index a64926b0..aa63177e 100644
--- a/hawk/lib/hawk-utl.h
+++ b/hawk/lib/hawk-utl.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk-xma.h b/hawk/lib/hawk-xma.h
index dc761645..8386f51a 100644
--- a/hawk/lib/hawk-xma.h
+++ b/hawk/lib/hawk-xma.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk.c b/hawk/lib/hawk.c
index a207bbef..68823cec 100644
--- a/hawk/lib/hawk.c
+++ b/hawk/lib/hawk.c
@@ -1,6 +1,4 @@
 /*
- * $Id$ 
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/hawk.h b/hawk/lib/hawk.h
index d6c7c7df..b59655eb 100644
--- a/hawk/lib/hawk.h
+++ b/hawk/lib/hawk.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/htb.c b/hawk/lib/htb.c
index ed7344bf..dccd7231 100644
--- a/hawk/lib/htb.c
+++ b/hawk/lib/htb.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/idmap-imp.h b/hawk/lib/idmap-imp.h
index 306c524f..96b477b2 100644
--- a/hawk/lib/idmap-imp.h
+++ b/hawk/lib/idmap-imp.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mb8.c b/hawk/lib/mb8.c
index fdb16501..e1018d5c 100644
--- a/hawk/lib/mb8.c
+++ b/hawk/lib/mb8.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/misc-imp.h b/hawk/lib/misc-imp.h
index 58716c76..c8bb6b34 100644
--- a/hawk/lib/misc-imp.h
+++ b/hawk/lib/misc-imp.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/misc-prv.h b/hawk/lib/misc-prv.h
index 081cb153..32f8d98b 100644
--- a/hawk/lib/misc-prv.h
+++ b/hawk/lib/misc-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/misc.c b/hawk/lib/misc.c
index 9af2c799..d61ea4e6 100644
--- a/hawk/lib/misc.c
+++ b/hawk/lib/misc.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-hawk.c b/hawk/lib/mod-hawk.c
index e7e0da84..d19fb9d9 100644
--- a/hawk/lib/mod-hawk.c
+++ b/hawk/lib/mod-hawk.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-hawk.h b/hawk/lib/mod-hawk.h
index e4e8f414..4c37d56b 100644
--- a/hawk/lib/mod-hawk.h
+++ b/hawk/lib/mod-hawk.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-math.c b/hawk/lib/mod-math.c
index d5b2e1c1..d24a9a25 100644
--- a/hawk/lib/mod-math.c
+++ b/hawk/lib/mod-math.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-math.h b/hawk/lib/mod-math.h
index 6b63a506..c4ca48cb 100644
--- a/hawk/lib/mod-math.h
+++ b/hawk/lib/mod-math.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-str.c b/hawk/lib/mod-str.c
index ff4d120d..8f07bb52 100644
--- a/hawk/lib/mod-str.c
+++ b/hawk/lib/mod-str.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-str.h b/hawk/lib/mod-str.h
index 85fe15a1..17f5610a 100644
--- a/hawk/lib/mod-str.h
+++ b/hawk/lib/mod-str.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-sys.c b/hawk/lib/mod-sys.c
index d2cc40a6..81600370 100644
--- a/hawk/lib/mod-sys.c
+++ b/hawk/lib/mod-sys.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mod-sys.h b/hawk/lib/mod-sys.h
index cc5a2111..9437879e 100644
--- a/hawk/lib/mod-sys.h
+++ b/hawk/lib/mod-sys.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/mtx.c b/hawk/lib/mtx.c
index c0d41d96..64c9da2f 100644
--- a/hawk/lib/mtx.c
+++ b/hawk/lib/mtx.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/parse-prv.h b/hawk/lib/parse-prv.h
index 44e27c18..d626c17a 100644
--- a/hawk/lib/parse-prv.h
+++ b/hawk/lib/parse-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/parse.c b/hawk/lib/parse.c
index e6d20f06..5613e17a 100644
--- a/hawk/lib/parse.c
+++ b/hawk/lib/parse.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/pio.c b/hawk/lib/pio.c
index 072fc3af..fdac09dc 100644
--- a/hawk/lib/pio.c
+++ b/hawk/lib/pio.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/rbt.c b/hawk/lib/rbt.c
index e4a67816..385e59e5 100644
--- a/hawk/lib/rbt.c
+++ b/hawk/lib/rbt.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/rec.c b/hawk/lib/rec.c
index 9f413ff3..eda41bda 100644
--- a/hawk/lib/rec.c
+++ b/hawk/lib/rec.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/rio-prv.h b/hawk/lib/rio-prv.h
index c82ba583..33076c0c 100644
--- a/hawk/lib/rio-prv.h
+++ b/hawk/lib/rio-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/rio.c b/hawk/lib/rio.c
index d6c40674..19a9d649 100644
--- a/hawk/lib/rio.c
+++ b/hawk/lib/rio.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/run-prv.h b/hawk/lib/run-prv.h
index 06833495..bb0f13c2 100644
--- a/hawk/lib/run-prv.h
+++ b/hawk/lib/run-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/run.c b/hawk/lib/run.c
index c53aac23..96656d8a 100644
--- a/hawk/lib/run.c
+++ b/hawk/lib/run.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/sed-prv.h b/hawk/lib/sed-prv.h
index d86a3615..b2be7fb5 100644
--- a/hawk/lib/sed-prv.h
+++ b/hawk/lib/sed-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/sed.c b/hawk/lib/sed.c
index 9074e3b7..26dd8ede 100644
--- a/hawk/lib/sed.c
+++ b/hawk/lib/sed.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/sio.c b/hawk/lib/sio.c
index 4712ba81..1d7bb5d7 100644
--- a/hawk/lib/sio.c
+++ b/hawk/lib/sio.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/skad-prv.h b/hawk/lib/skad-prv.h
index 4e53289a..f27e7f12 100644
--- a/hawk/lib/skad-prv.h
+++ b/hawk/lib/skad-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/skad.c b/hawk/lib/skad.c
index 9563fb25..e80756a4 100644
--- a/hawk/lib/skad.c
+++ b/hawk/lib/skad.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/std-sed.c b/hawk/lib/std-sed.c
index 3e2a38b9..04612edb 100644
--- a/hawk/lib/std-sed.c
+++ b/hawk/lib/std-sed.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/std.c b/hawk/lib/std.c
index 4972874e..81655bb0 100644
--- a/hawk/lib/std.c
+++ b/hawk/lib/std.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/syscall.h b/hawk/lib/syscall.h
index cf7ba8e2..b4dd1edb 100644
--- a/hawk/lib/syscall.h
+++ b/hawk/lib/syscall.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tio.c b/hawk/lib/tio.c
index 21470c2c..d9f74b7a 100644
--- a/hawk/lib/tio.c
+++ b/hawk/lib/tio.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-ast.c b/hawk/lib/tre-ast.c
index e8b6d526..1ed52963 100644
--- a/hawk/lib/tre-ast.c
+++ b/hawk/lib/tre-ast.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-ast.h b/hawk/lib/tre-ast.h
index f89090bc..2068f462 100644
--- a/hawk/lib/tre-ast.h
+++ b/hawk/lib/tre-ast.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-compile.c b/hawk/lib/tre-compile.c
index 7758bc71..a4d03e77 100644
--- a/hawk/lib/tre-compile.c
+++ b/hawk/lib/tre-compile.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-compile.h b/hawk/lib/tre-compile.h
index 9580088c..734d1d9f 100644
--- a/hawk/lib/tre-compile.h
+++ b/hawk/lib/tre-compile.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-match-bt.c b/hawk/lib/tre-match-bt.c
index 3c2708af..9ca4f1c4 100644
--- a/hawk/lib/tre-match-bt.c
+++ b/hawk/lib/tre-match-bt.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-match-pa.c b/hawk/lib/tre-match-pa.c
index 5304d8a2..f3e35342 100644
--- a/hawk/lib/tre-match-pa.c
+++ b/hawk/lib/tre-match-pa.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-match-ut.h b/hawk/lib/tre-match-ut.h
index cdf91fe6..d245b2f8 100644
--- a/hawk/lib/tre-match-ut.h
+++ b/hawk/lib/tre-match-ut.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-mem.c b/hawk/lib/tre-mem.c
index 25ceb86f..dd7a5927 100644
--- a/hawk/lib/tre-mem.c
+++ b/hawk/lib/tre-mem.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-mem.h b/hawk/lib/tre-mem.h
index 66a86347..54d1d5a2 100644
--- a/hawk/lib/tre-mem.h
+++ b/hawk/lib/tre-mem.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-parse.c b/hawk/lib/tre-parse.c
index d670aa46..e171008b 100644
--- a/hawk/lib/tre-parse.c
+++ b/hawk/lib/tre-parse.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-parse.h b/hawk/lib/tre-parse.h
index c84dfe41..c9d9cd99 100644
--- a/hawk/lib/tre-parse.h
+++ b/hawk/lib/tre-parse.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-prv.h b/hawk/lib/tre-prv.h
index fa31e3ea..5210a8e5 100644
--- a/hawk/lib/tre-prv.h
+++ b/hawk/lib/tre-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-stack.c b/hawk/lib/tre-stack.c
index 1b7ed123..3527a0e3 100644
--- a/hawk/lib/tre-stack.c
+++ b/hawk/lib/tre-stack.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre-stack.h b/hawk/lib/tre-stack.h
index cad621e5..2702e863 100644
--- a/hawk/lib/tre-stack.h
+++ b/hawk/lib/tre-stack.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tre.c b/hawk/lib/tre.c
index 8ce3108c..a6ed375d 100644
--- a/hawk/lib/tre.c
+++ b/hawk/lib/tre.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tree-prv.h b/hawk/lib/tree-prv.h
index 452b0bf9..406bb5b0 100644
--- a/hawk/lib/tree-prv.h
+++ b/hawk/lib/tree-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/tree.c b/hawk/lib/tree.c
index 69f9c01f..7b813927 100644
--- a/hawk/lib/tree.c
+++ b/hawk/lib/tree.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utf16.c b/hawk/lib/utf16.c
index 8d917ea6..1bc35129 100644
--- a/hawk/lib/utf16.c
+++ b/hawk/lib/utf16.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utf8.c b/hawk/lib/utf8.c
index 0b8c420e..68193bf8 100644
--- a/hawk/lib/utf8.c
+++ b/hawk/lib/utf8.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl-ass.c b/hawk/lib/utl-ass.c
index 0cd124b9..0d11cbc2 100644
--- a/hawk/lib/utl-ass.c
+++ b/hawk/lib/utl-ass.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl-rnd.c b/hawk/lib/utl-rnd.c
index d0125087..46f85baa 100644
--- a/hawk/lib/utl-rnd.c
+++ b/hawk/lib/utl-rnd.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl-sort.c b/hawk/lib/utl-sort.c
index b639ae1c..4a9787e4 100644
--- a/hawk/lib/utl-sort.c
+++ b/hawk/lib/utl-sort.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl-str.c b/hawk/lib/utl-str.c
index ce0ceeda..f7cec269 100644
--- a/hawk/lib/utl-str.c
+++ b/hawk/lib/utl-str.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl-sys.c b/hawk/lib/utl-sys.c
index add61f6f..38b3a912 100644
--- a/hawk/lib/utl-sys.c
+++ b/hawk/lib/utl-sys.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/utl.c b/hawk/lib/utl.c
index 3182a515..7bdbc00c 100644
--- a/hawk/lib/utl.c
+++ b/hawk/lib/utl.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/val-prv.h b/hawk/lib/val-prv.h
index d6b8eca2..9470ff26 100644
--- a/hawk/lib/val-prv.h
+++ b/hawk/lib/val-prv.h
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/val.c b/hawk/lib/val.c
index dd467115..b54d93f7 100644
--- a/hawk/lib/val.c
+++ b/hawk/lib/val.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
diff --git a/hawk/lib/xma.c b/hawk/lib/xma.c
index 9a177745..77aa8bb5 100644
--- a/hawk/lib/xma.c
+++ b/hawk/lib/xma.c
@@ -1,6 +1,4 @@
 /*
- * $Id$
- *
     Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without