Update copyright dates with scripts/update-copyrights

I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master

16 files changed, 16 insertions, 16 deletions

diff --git a/wctype/Makefile b/wctype/Makefile
index cdae6e6439..2a183ea4ef 100644
--- a/wctype/Makefile
+++ b/wctype/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1996-2020 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/bits/wctype-wchar.h b/wctype/bits/wctype-wchar.h
index 7152463bff..01827a7f2b 100644
--- a/wctype/bits/wctype-wchar.h
+++ b/wctype/bits/wctype-wchar.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/iswctype.c b/wctype/iswctype.c
index ce6c8709e7..4a6fbad0e1 100644
--- a/wctype/iswctype.c
+++ b/wctype/iswctype.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
 
diff --git a/wctype/iswctype_l.c b/wctype/iswctype_l.c
index e0f659a873..2aac4a552e 100644
--- a/wctype/iswctype_l.c
+++ b/wctype/iswctype_l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
 
diff --git a/wctype/test_wcfuncs.c b/wctype/test_wcfuncs.c
index 2bcf12f153..66bb912a60 100644
--- a/wctype/test_wcfuncs.c
+++ b/wctype/test_wcfuncs.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/test_wctype.c b/wctype/test_wctype.c
index c66f35a0b3..3686aed2f8 100644
--- a/wctype/test_wctype.c
+++ b/wctype/test_wctype.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/towctrans.c b/wctype/towctrans.c
index 82d4ef1278..fefd345428 100644
--- a/wctype/towctrans.c
+++ b/wctype/towctrans.c
@@ -1,5 +1,5 @@
 /* Map wide character using given mapping.
-   Copyright (C) 1996-2020 Free Software Foundation, Inc.
+   Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/towctrans_l.c b/wctype/towctrans_l.c
index a2515781c8..ca30aef6ed 100644
--- a/wctype/towctrans_l.c
+++ b/wctype/towctrans_l.c
@@ -1,5 +1,5 @@
 /* Map wide character using given mapping and locale.
-   Copyright (C) 1996-2020 Free Software Foundation, Inc.
+   Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/wcfuncs.c b/wctype/wcfuncs.c
index c4bfbcdfb4..e86a1ad966 100644
--- a/wctype/wcfuncs.c
+++ b/wctype/wcfuncs.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/wcfuncs_l.c b/wctype/wcfuncs_l.c
index 07b2abbed0..1e02e35a97 100644
--- a/wctype/wcfuncs_l.c
+++ b/wctype/wcfuncs_l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/wchar-lookup.h b/wctype/wchar-lookup.h
index ea5688923c..07aedd4f34 100644
--- a/wctype/wchar-lookup.h
+++ b/wctype/wchar-lookup.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.
 
diff --git a/wctype/wctrans.c b/wctype/wctrans.c
index cc0aa4e7b5..30a45ddd8a 100644
--- a/wctype/wctrans.c
+++ b/wctype/wctrans.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
 
diff --git a/wctype/wctrans_l.c b/wctype/wctrans_l.c
index a9457b69c6..b53f939f5a 100644
--- a/wctype/wctrans_l.c
+++ b/wctype/wctrans_l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/wctype.c b/wctype/wctype.c
index e787840bbd..a4010b05e2 100644
--- a/wctype/wctype.c
+++ b/wctype/wctype.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
 
diff --git a/wctype/wctype.h b/wctype/wctype.h
index 06260c4f38..a5618022e3 100644
--- a/wctype/wctype.h
+++ b/wctype/wctype.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/wctype/wctype_l.c b/wctype/wctype_l.c
index b74a7c0524..c16d33850a 100644
--- a/wctype/wctype_l.c
+++ b/wctype/wctype_l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.