blurb: support Python 3.10, drop EOL 3.6, and fix README badges (#419)

Author: hugovk

.github/workflows/tests.yml

@@ -13,10 +13,10 @@ jobs:
     strategy:
       matrix:
         python:
-          - '3.6'
           - '3.7'
           - '3.8'
           - '3.9'
+          - '3.10'
     name: ${{ matrix.python }}
     runs-on: ubuntu-latest
     steps:

README.rst

@@ -2,12 +2,13 @@ core-workflow
 =============
 Issue tracker and relevant tools for CPython's workflow
 
-.. image:: https://travis-ci.org/python/core-workflow.svg?branch=master
-    :target: https://travis-ci.org/python/core-workflow
+.. image:: https://github.com/python/core-workflow/actions/workflows/tests.yml/badge.svg
+   :alt: GitHub Actions
+   :target: https://github.com/python/core-workflow/actions
 
-.. image:: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
-   :alt: Python Zulip chat
-   :target: https://python.zulipchat.com
+.. image:: https://img.shields.io/badge/Discourse-join_chat-brightgreen.svg
+   :alt: Python Discourse chat
+   :target: https://discuss.python.org/
 
 blurb
 -----

blurb/README.rst

@@ -25,7 +25,7 @@ and automatically uses the correct file paths.
 
 You can install **blurb** from PyPI using ``pip``.  Alternatively,
 simply add ``blurb`` to a directory on your path.
-**blurb**'s only dependency is Python 3.5+.
+**blurb**'s only dependency is Python 3.7+.
 
 
 Files used by blurb

blurb/blurb.py

@@ -521,7 +521,7 @@ def load(self, filename, *, metadata=None):
 
 Broadly equivalent to blurb.parse(open(filename).read()).
         """
-        with open(filename, "rt", encoding="utf-8") as file:
+        with open(filename, encoding="utf-8") as file:
             text = file.read()
         self.parse(text, metadata=metadata, filename=filename)
 
@@ -683,7 +683,7 @@ def filename_test(self, filename):
 
 
 def run(s):
-    process = subprocess.run(s.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    process = subprocess.run(s.split(), capture_output=True)
     process.check_returncode()
     return process.stdout.decode('ascii')
 
@@ -711,7 +711,7 @@ def chdir_to_repo_root():
         def test_first_line(filename, test):
             if not os.path.exists(filename):
                 return False
-            with open(filename, "rt") as file:
+            with open(filename) as file:
                 lines = file.read().split('\n')
                 if not (lines and test(lines[0])):
                     return False
@@ -1335,7 +1335,7 @@ def flush_version():
         blurbs.clear()
         version_count += 1
 
-    with open("NEWS", "rt", encoding="utf-8") as file:
+    with open("NEWS", encoding="utf-8") as file:
         for line_number, line in enumerate(file):
             line = line.rstrip()
 

blurb/pyproject.toml

@@ -9,7 +9,7 @@ author-email = "larry@hastings.org"
 maintainer = "Python Core Developers"
 maintainer-email = "core-workflow@mail.python.org"
 home-page = "https://github.com/python/core-workflow/tree/master/blurb"
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 description-file = "README.rst"
 classifiers = [
     "Intended Audience :: Developers",