Update copyrights.

Author: michaelrsweet

htmldoc/gui.cxx

@@ -1,7 +1,7 @@
 //
 // GUI routines for HTMLDOC, an HTML document processing program.
 //
-// Copyright © 2011-2023 by Michael R Sweet.
+// Copyright © 2011-2024 by Michael R Sweet.
 // Copyright © 1997-2010 by Easy Software Products. All rights reserved.
 //
 // This program is free software. Distribution and use rights are outlined in
@@ -4284,7 +4284,7 @@ GUI::showAboutCB(void)
  label->image(&logo);
 
  label = new Fl_Box(60, 45, 530, 35,
- "HTMLDOC " SVERSION "\nCopyright © 2011-2023 by Michael R Sweet."
+ "HTMLDOC " SVERSION "\nCopyright © 2011-2024 by Michael R Sweet."
  );
  label->align(FL_ALIGN_TOP_LEFT | FL_ALIGN_INSIDE | FL_ALIGN_WRAP);
 

htmldoc/htmldoc.cxx

@@ -1,7 +1,7 @@
 /*
  * Main entry for HTMLDOC, a HTML document processing program.
  *
- * Copyright 2011-2023 by Michael R Sweet.
+ * Copyright 2011-2024 by Michael R Sweet.
  * Copyright 1997-2010 by Easy Software Products. All rights reserved.
  *
  * This program is free software. Distribution and use rights are outlined in
@@ -2617,7 +2617,7 @@ usage(const char *arg)	// I - Bad argument string
  if (CGIMode)
  puts("Content-Type: text/plain\r\n\r");
 
- puts("HTMLDOC Version " SVERSION " Copyright 2011-2022 by Michael R Sweet.");
+ puts("HTMLDOC Version " SVERSION " Copyright 2011-2024 by Michael R Sweet.");
  puts("HTMLDOC is provided under the terms of the GNU General Public License and");
  puts("comes with absolutely no warranty. This software is based in part on the work");
  puts("of the Independent JPEG Group.");

htmldoc/license.cxx

@@ -2,7 +2,7 @@
 // GUI license dialog routines for HTMLDOC, an HTML document processing
 // program.
 //
-// Copyright 2011-2020 by Michael R Sweet.
+// Copyright 2011-2024 by Michael R Sweet.
 // Copyright 1997-2010 by Easy Software Products. All rights reserved.
 //
 // This program is free software. Distribution and use rights are outlined in
@@ -59,7 +59,7 @@ GUI::showLicenseCB(void)
  group->labelsize(18);
 
  box = new Fl_Box(20, 45, 600, 110,
- "Copyright © 2011-2022 by Michael R Sweet.\n\n"
+ "Copyright © 2011-2024 by Michael R Sweet.\n\n"
  "HTMLDOC is provided under the terms of the GNU General Public License and "
  "comes with absolutely no warranty. Please report problems on the Github "
  "issues page at:\n\n"