_collections builtins: fix (c) header

Author: cosminbasca

graalpython/lib-graalpython/_collections.py

@@ -1,49 +1,33 @@
-# Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+# Copyright (c) 2018, Oracle and/or its affiliates.
+# Copyright (c) 2017, The PyPy Project
 #
-# The Universal Permissive License (UPL), Version 1.0
+#     The MIT License
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use,
+# copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
 #
-# Subject to the condition set forth below, permission is hereby granted to any
-# person obtaining a copy of this software, associated documentation and/or
-# data (collectively the "Software"), free of charge and under any and all
-# copyright rights in the Software, and any and all patent rights owned or
-# freely licensable by each licensor hereunder covering either (i) the
-# unmodified Software as contributed to or provided by such licensor, or (ii)
-# the Larger Works (as defined below), to deal in both
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
 #
-# (a) the Software, and
-#
-# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
-# one is included with the Software each a "Larger Work" to which the Software
-# is contributed by such licensors),
-#
-# without restriction, including without limitation the rights to copy, create
-# derivative works of, display, perform, and distribute the Software and make,
-# use, sell, offer for sale, import, export, have made, and have sold the
-# Software and the Larger Work(s), and to sublicense the foregoing rights on
-# either these or other terms.
-#
-# This license is subject to the following condition:
-#
-# The above copyright notice and either this complete permission notice or at a
-# minimum a reference to the UPL must be included in all copies or substantial
-# portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+# DEALINGS IN THE SOFTWARE.
 import sys
 
 
-# this code is ported from pypy
 BLOCKLEN = 62
 CENTER = ((BLOCKLEN - 1) // 2)
 
 
+# the deque implementation with helper functions and data structures has been ported from pypy.
 class Block(object):
     __slots__ = ('leftlink', 'rightlink', 'data')