Copyright for prompt-toolkit source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: prompt_toolkit
Source: https://github.com/jonathanslenders/python-prompt-toolkit

Files: *
Copyright: Copyright (c) 2014 Jonathan Slenders
License: BSD-3-clause

Files: debian/*
Copyright: Copyright (c) 2015 Lennart Weller 
           Copyright (c) 2015 Scott Kitterman 
License: BSD-3-clause

License: BSD-3-clause
 All rights reserved.
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 modification, are permitted provided that the following conditions are
 met:
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 Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
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 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.
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 Neither the name of the modp.com nor the names of its
 contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.
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 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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