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diff --git a/third_party/jpeg-xl/debian/copyright b/third_party/jpeg-xl/debian/copyright
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+++ b/third_party/jpeg-xl/debian/copyright
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+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: jpeg-xl
+
+Files: *
+Copyright: 2020 the JPEG XL Project
+License: BSD-3-clause
+
+Files: third_party/sjpeg/*
+Copyright: 2017 Google, Inc
+License: Apache-2.0
+
+Files: third_party/skcms/*
+Copyright: 2018 Google Inc.
+License: BSD-3-clause
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ .
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name of Google Inc. nor the names of its
+ contributors may be used to endorse or promote products derived from
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+ .
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+
+Files: testdata/external/pngsuite/*
+Copyright: Willem van Schaik, 1996, 2011
+License: PngSuite License
+ See http://www.schaik.com/pngsuite/ for details.
+ .
+ Permission to use, copy, modify and distribute these images for any
+ purpose and without fee is hereby granted.
+
+Files: testdata/external/raw.pixls/*
+Copyright: their respective owners listed in https://raw.pixls.us/
+License: CC0-1.0
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+Files: testdata/external/wesaturate/*
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+License: CC0-1.0
+
+Files: testdata/external/wide-gamut-tests/
+Copyright: github.com/codelogic/wide-gamut-tests authors.
+License: Apache-2.0
+
+License: Apache-2.0
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+ On Debian systems, the complete text of the Apache License, Version 2
+ can be found in "/usr/share/common-licenses/Apache-2.0".
+
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