Update copyright year range in header of all files managed by GDB

This commit is the result of the following actions:

  - Running gdb/copyright.py to update all of the copyright headers to
    include 2024,

  - Manually updating a few files the copyright.py script told me to
    update, these files had copyright headers embedded within the
    file,

  - Regenerating gdbsupport/Makefile.in to refresh it's copyright
    date,

  - Using grep to find other files that still mentioned 2023.  If
    these files were updated last year from 2022 to 2023 then I've
    updated them this year to 2024.

I'm sure I've probably missed some dates.  Feel free to fix them up as
you spot them.

6 files changed, 6 insertions, 6 deletions

diff --git a/gdb/testsuite/gdb.gdb/index-file.exp b/gdb/testsuite/gdb.gdb/index-file.exp
index 7154d23..72088ca 100644
--- a/gdb/testsuite/gdb.gdb/index-file.exp
+++ b/gdb/testsuite/gdb.gdb/index-file.exp
@@ -1,4 +1,4 @@
-# Copyright 2023 Free Software Foundation, Inc.
+# Copyright 2023-2024 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/gdb/testsuite/gdb.gdb/python-helper.cc b/gdb/testsuite/gdb.gdb/python-helper.cc
index c1e16da..7f4a147 100644
--- a/gdb/testsuite/gdb.gdb/python-helper.cc
+++ b/gdb/testsuite/gdb.gdb/python-helper.cc
@@ -1,6 +1,6 @@
 /* This testcase is part of GDB, the GNU debugger.
 
-   Copyright 2021-2023 Free Software Foundation, Inc.
+   Copyright 2021-2024 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
diff --git a/gdb/testsuite/gdb.gdb/python-helper.exp b/gdb/testsuite/gdb.gdb/python-helper.exp
index a5d8308..8a8afb1 100644
--- a/gdb/testsuite/gdb.gdb/python-helper.exp
+++ b/gdb/testsuite/gdb.gdb/python-helper.exp
@@ -1,4 +1,4 @@
-# Copyright 2021-2023 Free Software Foundation, Inc.
+# Copyright 2021-2024 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/gdb/testsuite/gdb.gdb/selftest.exp b/gdb/testsuite/gdb.gdb/selftest.exp
index 23d180a..1984f47 100644
--- a/gdb/testsuite/gdb.gdb/selftest.exp
+++ b/gdb/testsuite/gdb.gdb/selftest.exp
@@ -1,4 +1,4 @@
-# Copyright 1988-2023 Free Software Foundation, Inc.
+# Copyright 1988-2024 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/gdb/testsuite/gdb.gdb/unittest.c b/gdb/testsuite/gdb.gdb/unittest.c
index 0a1de3a..b1ce99c 100644
--- a/gdb/testsuite/gdb.gdb/unittest.c
+++ b/gdb/testsuite/gdb.gdb/unittest.c
@@ -1,6 +1,6 @@
 /* This testcase is part of GDB, the GNU debugger.
 
-   Copyright 2021-2023 Free Software Foundation, Inc.
+   Copyright 2021-2024 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
diff --git a/gdb/testsuite/gdb.gdb/unittest.exp b/gdb/testsuite/gdb.gdb/unittest.exp
index 5434a1a..e154c04 100644
--- a/gdb/testsuite/gdb.gdb/unittest.exp
+++ b/gdb/testsuite/gdb.gdb/unittest.exp
@@ -1,4 +1,4 @@
-# Copyright 2016-2023 Free Software Foundation, Inc.
+# Copyright 2016-2024 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by