We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
unicode literrals
based on irc discussion with @rjarry  

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `master/buildbot/util/lineboundaries.py`
Content:
```
1 # This file is part of Buildbot.  Buildbot is free software: you can
2 # redistribute it and/or modify it under the terms of the GNU General Public
3 # License as published by the Free Software Foundation, version 2.
4 #
5 # This program is distributed in the hope that it will be useful, but WITHOUT
6 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
7 # FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
8 # details.
9 #
10 # You should have received a copy of the GNU General Public License along with
11 # this program; if not, write to the Free Software Foundation, Inc., 51
12 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
13 #
14 # Copyright Buildbot Team Members
15 
16 from twisted.internet import defer
17 
18 
19 class LineBoundaryFinder(object):
20 
21     __slots__ = ['partialLine', 'callback']
22 
23     def __init__(self, callback):
24         self.partialLine = None
25         self.callback = callback
26 
27     def append(self, text):
28         if self.partialLine:
29             text = self.partialLine + text
30             self.partialLine = None
31         if text:
32             if text[-1] != '\n':
33                 i = text.rfind('\n')
34                 if i >= 0:
35                     i = i + 1
36                     text, self.partialLine = text[:i], text[i:]
37                 else:
38                     self.partialLine = text
39                     return defer.succeed(None)
40             return self.callback(text)
41 
42     def flush(self):
43         if self.partialLine:
44             return self.append('\n')
45         else:
46             return defer.succeed(None)
47
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/master/buildbot/util/lineboundaries.py b/master/buildbot/util/lineboundaries.py
--- a/master/buildbot/util/lineboundaries.py
+++ b/master/buildbot/util/lineboundaries.py
@@ -13,6 +13,8 @@
 #
 # Copyright Buildbot Team Members
 
+import re
+
 from twisted.internet import defer
 
 
@@ -20,6 +22,10 @@
 
     __slots__ = ['partialLine', 'callback']
 
+    # the lookahead here (`(?=.)`) ensures that `\r` doesn't match at the end
+    # of the buffer
+    newline_re = re.compile(r'(\r\n|\r(?=.)|\n)')
+
     def __init__(self, callback):
         self.partialLine = None
         self.callback = callback
@@ -28,6 +34,7 @@
         if self.partialLine:
             text = self.partialLine + text
             self.partialLine = None
+        text = self.newline_re.sub('\n', text)
         if text:
             if text[-1] != '\n':
                 i = text.rfind('\n')

{"golden_diff": "diff --git a/master/buildbot/util/lineboundaries.py b/master/buildbot/util/lineboundaries.py\n--- a/master/buildbot/util/lineboundaries.py\n+++ b/master/buildbot/util/lineboundaries.py\n@@ -13,6 +13,8 @@\n #\n # Copyright Buildbot Team Members\n \n+import re\n+\n from twisted.internet import defer\n \n \n@@ -20,6 +22,10 @@\n \n     __slots__ = ['partialLine', 'callback']\n \n+    # the lookahead here (`(?=.)`) ensures that `\\r` doesn't match at the end\n+    # of the buffer\n+    newline_re = re.compile(r'(\\r\\n|\\r(?=.)|\\n)')\n+\n     def __init__(self, callback):\n         self.partialLine = None\n         self.callback = callback\n@@ -28,6 +34,7 @@\n         if self.partialLine:\n             text = self.partialLine + text\n             self.partialLine = None\n+        text = self.newline_re.sub('\\n', text)\n         if text:\n             if text[-1] != '\\n':\n                 i = text.rfind('\\n')\n", "issue": "unicode literrals\nbased on irc discussion with @rjarry  \n", "before_files": [{"content": "# This file is part of Buildbot.  Buildbot is free software: you can\n# redistribute it and/or modify it under the terms of the GNU General Public\n# License as published by the Free Software Foundation, version 2.\n#\n# This program is distributed in the hope that it will be useful, but WITHOUT\n# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\n# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more\n# details.\n#\n# You should have received a copy of the GNU General Public License along with\n# this program; if not, write to the Free Software Foundation, Inc., 51\n# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\n#\n# Copyright Buildbot Team Members\n\nfrom twisted.internet import defer\n\n\nclass LineBoundaryFinder(object):\n\n    __slots__ = ['partialLine', 'callback']\n\n    def __init__(self, callback):\n        self.partialLine = None\n        self.callback = callback\n\n    def append(self, text):\n        if self.partialLine:\n            text = self.partialLine + text\n            self.partialLine = None\n        if text:\n            if text[-1] != '\\n':\n                i = text.rfind('\\n')\n                if i >= 0:\n                    i = i + 1\n                    text, self.partialLine = text[:i], text[i:]\n                else:\n                    self.partialLine = text\n                    return defer.succeed(None)\n            return self.callback(text)\n\n    def flush(self):\n        if self.partialLine:\n            return self.append('\\n')\n        else:\n            return defer.succeed(None)\n", "path": "master/buildbot/util/lineboundaries.py"}], "after_files": [{"content": "# This file is part of Buildbot.  Buildbot is free software: you can\n# redistribute it and/or modify it under the terms of the GNU General Public\n# License as published by the Free Software Foundation, version 2.\n#\n# This program is distributed in the hope that it will be useful, but WITHOUT\n# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\n# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more\n# details.\n#\n# You should have received a copy of the GNU General Public License along with\n# this program; if not, write to the Free Software Foundation, Inc., 51\n# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\n#\n# Copyright Buildbot Team Members\n\nimport re\n\nfrom twisted.internet import defer\n\n\nclass LineBoundaryFinder(object):\n\n    __slots__ = ['partialLine', 'callback']\n\n    # the lookahead here (`(?=.)`) ensures that `\\r` doesn't match at the end\n    # of the buffer\n    newline_re = re.compile(r'(\\r\\n|\\r(?=.)|\\n)')\n\n    def __init__(self, callback):\n        self.partialLine = None\n        self.callback = callback\n\n    def append(self, text):\n        if self.partialLine:\n            text = self.partialLine + text\n            self.partialLine = None\n        text = self.newline_re.sub('\\n', text)\n        if text:\n            if text[-1] != '\\n':\n                i = text.rfind('\\n')\n                if i >= 0:\n                    i = i + 1\n                    text, self.partialLine = text[:i], text[i:]\n                else:\n                    self.partialLine = text\n                    return defer.succeed(None)\n            return self.callback(text)\n\n    def flush(self):\n        if self.partialLine:\n            return self.append('\\n')\n        else:\n            return defer.succeed(None)\n", "path": "master/buildbot/util/lineboundaries.py"}]}