Fix argparse for python3.10 (#33)

* rework

* add support for 3.10

.bumpversion.cfg

@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.3.1
 commit = False
 tag = False
 

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, '3.10.0-beta.4']
 
     steps:
     - uses: actions/checkout@v2
@@ -20,4 +20,3 @@ jobs:
       run: pip install nox
     - name: Run tests session
       run: nox --sessions tests --python ${{ matrix.python-version }}
-

CHANGES.md

@@ -1,4 +1,5 @@
-## Version 0.3.0
+### Version 0.3.1 (2021-07-13)
+* Fix argparse for python3.10
 
 ### Version 0.3.0 (2021-07-12)
 * Add support for mermaid code

noxfile.py

@@ -7,7 +7,19 @@
 
 @nox.session(
     reuse_venv=True,
-    python=["2.7", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "pypy", "pypy3"],
+    python=[
+        "2.7",
+        "3.4",
+        "3.5",
+        "3.6",
+        "3.7",
+        "3.8",
+        "3.9",
+        "3.10",
+        "3.10.0-beta.4",
+        "pypy",
+        "pypy3",
+    ],
 )
 def tests(session):
     """Run all tests."""

requirements-test.txt

@@ -1,4 +1,5 @@
 mock; python_version < '3.3'
 pytest
 pytest-cov
+six
 sphinx

setup.py

@@ -19,7 +19,7 @@
         readme = f.read()
 
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"
 
 install_requires = ["mistune", "docutils"]
 test_requirements = ["pygments"]
@@ -58,6 +58,7 @@
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: Text Processing",
     ],
     install_requires=install_requires,

tests/test_cli.py

@@ -9,7 +9,7 @@
 from copy import copy
 from unittest import TestCase
 import subprocess
-
+import six
 from m2r2 import parse_from_file, main, options
 
 if sys.version_info < (3,):
@@ -58,7 +58,7 @@ def test_no_file(self):
         self.assertIn('underscore-emphasis', message)
         self.assertIn('anonymous-references', message)
         self.assertIn('inline-math', message)
-        self.assertIn('optional arguments:', message)
+        six.assertRegex(self, message, r"option(s|al arguments):")
 
     def test_parse_file(self):
         output = parse_from_file(test_md)