Replace 1

cat files.out |  xargs -I %s perl -i~ -0777 -pe 's/\/\*=========================================================================(.|\n)*.*Program:   Visualization Toolkit\n.*Module:.*\n\n  Copyright \(c\) Ken Martin, Will Schroeder, Bill Lorensen\n  All rights reserved.\n  See Copyright.txt or .* for details.\n\n.*\n.*\n.*\n.*\*\//\/\/ SPDX-FileCopyrightText: Copyright \(c\) Ken Martin, Will Schroeder, Bill Lorensen\n\/\/ SPDX-License-Identifier: BSD-3-CLAUSE/g' %s

Replace 2

cat files.out |  xargs -I %s perl -i~ -0777 -pe 's/\/\*=========================================================================(.|\n)*.*Program:   Visualization Toolkit\n.*Module:.*\n\n  Copyright \(c\) Ken Martin, Will Schroeder, Bill Lorensen\n  All rights reserved.\n  See Copyright.txt or .* for details.\n\n.*\n.*\n.*\n\n.*\*\//\/\/ SPDX-FileCopyrightText: Copyright \(c\) Ken Martin, Will Schroeder, Bill Lorensen\n\/\/ SPDX-License-Identifier: BSD-3-CLAUSE/g...