Correct spelling in PULL_REQUEST_TEMPLATE
-This PR has the objective of <describe here>
+This PR has the objective of <describe it here>.
## Changes
-1. Added new `xyz` to...
+1. Added new feature for...
2. Fixed a bug in...
-3. Changed the behaviour of...
+3. Changed the behavior of...
4. Improved the docs about...
## Checklist
-Use this checklist for assuring the quality of pull requests that include new code and or make changes to existing code.
+Use this checklist to ensure the quality of pull requests that include new code and/or make changes to existing code.
-* [ ] Source Code rules apply:
+* [ ] Source Code guidelines:
* [ ] Includes unit tests
* [ ] New functions have docstrings with examples that can be run with doctest
* [ ] New functions are included in API docs
- * [ ] Docstrings include notes for any changes to API or behaviour
+ * [ ] Docstrings include notes for any changes to API or behavior
* [ ] All changes are documented in docs/changes.rst
-* [ ] Versioning and history tracking rules apply:
- * [ ] Using atomic commits when possible
- * [ ] Commits are reversible when possible
- * [ ] There is no incomplete changes in the pull request
- * [ ] There is no accidental garbage added in source code
-* [ ] Testing rules apply:
+* [ ] Versioning and history tracking guidelines:
+ * [ ] Using atomic commits whenever possible
+ * [ ] Commits are reversible whenever possible
+ * [ ] There are no incomplete changes in the pull request
+ * [ ] There is no accidental garbage added to the source code
+* [ ] Testing guidelines:
* [ ] Tested locally using `tox` / `pytest`
+ * [ ] Rebased to `master` branch and tested before sending the PR
* [ ] Automated testing passes (see [CI](https://github.com/petl-developers/petl/actions))
* [ ] Unit test coverage has not decreased (see [Coveralls](https://coveralls.io/github/petl-developers/petl))
* [ ] State of these changes is:
