Merge pull request #1363 from Zelgius/pull_request_template

Pull request template

.github/pull_request_template.md

+<!-- First time contributors: Take a moment to review https://setuptools.readthedocs.io/en/latest/developer-guide.html! -->
+<!-- Remove sections if not applicable -->
+
+## Summary of changes
+
+<!-- Summary goes here -->
+
+Closes <!-- issue number here -->
+
+### Pull Request Checklist
+- [ ] Changes have tests
+- [ ] News fragment added in changelog.d. See [documentation](http://setuptools.readthedocs.io/en/latest/developer-guide.html#making-a-pull-request) for details

changelog.d/1355.misc.rst

+Add PR template.

docs/developer-guide.txt

@@ -62,8 +62,8 @@ Making a pull request
 ---------------------
 
 When making a pull request, please include a short summary of the changes
-and a reference to any issue tickets that the PR is intended to solve. All
-PRs with code changes should include tests. All changes should include a
+and a reference to any issue tickets that the PR is intended to solve.
+All PRs with code changes should include tests. All changes should include a
 changelog entry.
 
 ``setuptools`` uses `towncrier <https://town-crier.readthedocs.io/en/latest/>`_