Blame python-sphinxcontrib-bibtex-orderedset.patch

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--- requirements.txt.orig	2018-12-08 11:30:14.633258651 -0700
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+++ requirements.txt	2018-12-08 11:30:51.118169972 -0700
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@@ -2,5 +2,5 @@ pybtex>=0.20
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 pybtex>=0.20
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 pybtex-docutils>=0.2.0
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 Sphinx>=2.0
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-oset>=0.1.3
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+orderedset>=2.0
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--- sphinxcontrib/bibtex/cache.py.orig	2018-11-28 06:47:17.000000000 -0700
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+++ sphinxcontrib/bibtex/cache.py	2018-12-08 11:30:14.633258651 -0700
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@@ -24,7 +24,7 @@ except ImportError:  # pragma: no cover
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 import ast
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 import collections
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 import copy
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-from oset import oset
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+from orderedset import OrderedSet
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 import re
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@@ -200,7 +200,7 @@ class Cache:
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         self.bibfiles = {}
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         self._bibliographies = collections.defaultdict(dict)
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-        self._cited = collections.defaultdict(oset)
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+        self._cited = collections.defaultdict(OrderedSet)
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         self._enum_count = {}
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     def purge(self, docname):