We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Required pyparsing version
I've been experimenting with writing tests using the oldest allowed versions of our Python dependencies. `setup.py` for `letsencrypt-nginx` says it requires `pyparsing>=1.5.5` but when I pin version 1.5.5, I encounter problems. You can see Travis logs of the issue [here](https://travis-ci.org/letsencrypt/letsencrypt/jobs/100739657) and [here](https://travis-ci.org/letsencrypt/letsencrypt/jobs/100739658).

We should determine what version we require and update `setup.py` accordingly.


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `certbot-nginx/setup.py`
Content:
```
1 import sys
2 
3 from setuptools import find_packages
4 from setuptools import setup
5 from setuptools.command.test import test as TestCommand
6 
7 version = '1.3.0.dev0'
8 
9 # Remember to update local-oldest-requirements.txt when changing the minimum
10 # acme/certbot version.
11 install_requires = [
12     'acme>=1.0.0',
13     'certbot>=1.1.0',
14     'mock',
15     'PyOpenSSL',
16     'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?
17     'setuptools',
18     'zope.interface',
19 ]
20 
21 
22 class PyTest(TestCommand):
23     user_options = []
24 
25     def initialize_options(self):
26         TestCommand.initialize_options(self)
27         self.pytest_args = ''
28 
29     def run_tests(self):
30         import shlex
31         # import here, cause outside the eggs aren't loaded
32         import pytest
33         errno = pytest.main(shlex.split(self.pytest_args))
34         sys.exit(errno)
35 
36 
37 setup(
38     name='certbot-nginx',
39     version=version,
40     description="Nginx plugin for Certbot",
41     url='https://github.com/letsencrypt/letsencrypt',
42     author="Certbot Project",
43     author_email='client-dev@letsencrypt.org',
44     license='Apache License 2.0',
45     python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
46     classifiers=[
47         'Development Status :: 5 - Production/Stable',
48         'Environment :: Plugins',
49         'Intended Audience :: System Administrators',
50         'License :: OSI Approved :: Apache Software License',
51         'Operating System :: POSIX :: Linux',
52         'Programming Language :: Python',
53         'Programming Language :: Python :: 2',
54         'Programming Language :: Python :: 2.7',
55         'Programming Language :: Python :: 3',
56         'Programming Language :: Python :: 3.5',
57         'Programming Language :: Python :: 3.6',
58         'Programming Language :: Python :: 3.7',
59         'Programming Language :: Python :: 3.8',
60         'Topic :: Internet :: WWW/HTTP',
61         'Topic :: Security',
62         'Topic :: System :: Installation/Setup',
63         'Topic :: System :: Networking',
64         'Topic :: System :: Systems Administration',
65         'Topic :: Utilities',
66     ],
67 
68     packages=find_packages(),
69     include_package_data=True,
70     install_requires=install_requires,
71     entry_points={
72         'certbot.plugins': [
73             'nginx = certbot_nginx._internal.configurator:NginxConfigurator',
74         ],
75     },
76     test_suite='certbot_nginx',
77     tests_require=["pytest"],
78     cmdclass={"test": PyTest},
79 )
80
```
--- 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/certbot-nginx/setup.py b/certbot-nginx/setup.py
--- a/certbot-nginx/setup.py
+++ b/certbot-nginx/setup.py
@@ -13,7 +13,7 @@
     'certbot>=1.1.0',
     'mock',
     'PyOpenSSL',
-    'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?
+    'pyparsing>=1.5.5',  # Python3 support
     'setuptools',
     'zope.interface',
 ]

{"golden_diff": "diff --git a/certbot-nginx/setup.py b/certbot-nginx/setup.py\n--- a/certbot-nginx/setup.py\n+++ b/certbot-nginx/setup.py\n@@ -13,7 +13,7 @@\n     'certbot>=1.1.0',\n     'mock',\n     'PyOpenSSL',\n-    'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?\n+    'pyparsing>=1.5.5',  # Python3 support\n     'setuptools',\n     'zope.interface',\n ]\n", "issue": "Required pyparsing version\nI've been experimenting with writing tests using the oldest allowed versions of our Python dependencies. `setup.py` for `letsencrypt-nginx` says it requires `pyparsing>=1.5.5` but when I pin version 1.5.5, I encounter problems. You can see Travis logs of the issue [here](https://travis-ci.org/letsencrypt/letsencrypt/jobs/100739657) and [here](https://travis-ci.org/letsencrypt/letsencrypt/jobs/100739658).\n\nWe should determine what version we require and update `setup.py` accordingly.\n\n", "before_files": [{"content": "import sys\n\nfrom setuptools import find_packages\nfrom setuptools import setup\nfrom setuptools.command.test import test as TestCommand\n\nversion = '1.3.0.dev0'\n\n# Remember to update local-oldest-requirements.txt when changing the minimum\n# acme/certbot version.\ninstall_requires = [\n    'acme>=1.0.0',\n    'certbot>=1.1.0',\n    'mock',\n    'PyOpenSSL',\n    'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?\n    'setuptools',\n    'zope.interface',\n]\n\n\nclass PyTest(TestCommand):\n    user_options = []\n\n    def initialize_options(self):\n        TestCommand.initialize_options(self)\n        self.pytest_args = ''\n\n    def run_tests(self):\n        import shlex\n        # import here, cause outside the eggs aren't loaded\n        import pytest\n        errno = pytest.main(shlex.split(self.pytest_args))\n        sys.exit(errno)\n\n\nsetup(\n    name='certbot-nginx',\n    version=version,\n    description=\"Nginx plugin for Certbot\",\n    url='https://github.com/letsencrypt/letsencrypt',\n    author=\"Certbot Project\",\n    author_email='client-dev@letsencrypt.org',\n    license='Apache License 2.0',\n    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',\n    classifiers=[\n        'Development Status :: 5 - Production/Stable',\n        'Environment :: Plugins',\n        'Intended Audience :: System Administrators',\n        'License :: OSI Approved :: Apache Software License',\n        'Operating System :: POSIX :: Linux',\n        'Programming Language :: Python',\n        'Programming Language :: Python :: 2',\n        'Programming Language :: Python :: 2.7',\n        'Programming Language :: Python :: 3',\n        'Programming Language :: Python :: 3.5',\n        'Programming Language :: Python :: 3.6',\n        'Programming Language :: Python :: 3.7',\n        'Programming Language :: Python :: 3.8',\n        'Topic :: Internet :: WWW/HTTP',\n        'Topic :: Security',\n        'Topic :: System :: Installation/Setup',\n        'Topic :: System :: Networking',\n        'Topic :: System :: Systems Administration',\n        'Topic :: Utilities',\n    ],\n\n    packages=find_packages(),\n    include_package_data=True,\n    install_requires=install_requires,\n    entry_points={\n        'certbot.plugins': [\n            'nginx = certbot_nginx._internal.configurator:NginxConfigurator',\n        ],\n    },\n    test_suite='certbot_nginx',\n    tests_require=[\"pytest\"],\n    cmdclass={\"test\": PyTest},\n)\n", "path": "certbot-nginx/setup.py"}], "after_files": [{"content": "import sys\n\nfrom setuptools import find_packages\nfrom setuptools import setup\nfrom setuptools.command.test import test as TestCommand\n\nversion = '1.3.0.dev0'\n\n# Remember to update local-oldest-requirements.txt when changing the minimum\n# acme/certbot version.\ninstall_requires = [\n    'acme>=1.0.0',\n    'certbot>=1.1.0',\n    'mock',\n    'PyOpenSSL',\n    'pyparsing>=1.5.5',  # Python3 support\n    'setuptools',\n    'zope.interface',\n]\n\n\nclass PyTest(TestCommand):\n    user_options = []\n\n    def initialize_options(self):\n        TestCommand.initialize_options(self)\n        self.pytest_args = ''\n\n    def run_tests(self):\n        import shlex\n        # import here, cause outside the eggs aren't loaded\n        import pytest\n        errno = pytest.main(shlex.split(self.pytest_args))\n        sys.exit(errno)\n\n\nsetup(\n    name='certbot-nginx',\n    version=version,\n    description=\"Nginx plugin for Certbot\",\n    url='https://github.com/letsencrypt/letsencrypt',\n    author=\"Certbot Project\",\n    author_email='client-dev@letsencrypt.org',\n    license='Apache License 2.0',\n    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',\n    classifiers=[\n        'Development Status :: 5 - Production/Stable',\n        'Environment :: Plugins',\n        'Intended Audience :: System Administrators',\n        'License :: OSI Approved :: Apache Software License',\n        'Operating System :: POSIX :: Linux',\n        'Programming Language :: Python',\n        'Programming Language :: Python :: 2',\n        'Programming Language :: Python :: 2.7',\n        'Programming Language :: Python :: 3',\n        'Programming Language :: Python :: 3.5',\n        'Programming Language :: Python :: 3.6',\n        'Programming Language :: Python :: 3.7',\n        'Programming Language :: Python :: 3.8',\n        'Topic :: Internet :: WWW/HTTP',\n        'Topic :: Security',\n        'Topic :: System :: Installation/Setup',\n        'Topic :: System :: Networking',\n        'Topic :: System :: Systems Administration',\n        'Topic :: Utilities',\n    ],\n\n    packages=find_packages(),\n    include_package_data=True,\n    install_requires=install_requires,\n    entry_points={\n        'certbot.plugins': [\n            'nginx = certbot_nginx._internal.configurator:NginxConfigurator',\n        ],\n    },\n    test_suite='certbot_nginx',\n    tests_require=[\"pytest\"],\n    cmdclass={\"test\": PyTest},\n)\n", "path": "certbot-nginx/setup.py"}]}