docs(CHANGES): Note docstring fixes, improved linting

Author: tony

Diff for: CHANGES

@@ -14,6 +14,29 @@ $ pip install --user --upgrade --pre libtmux
 
 <!-- Maintainers and contributors: Insert change notes for the next release above -->
 
+### Documentation
+
+- Various docstring fixes and tweaks (#514)
+
+### Development
+
+- Strengthen linting (#514)
+
+  - Add flake8-commas (COM)
+
+	- https://docs.astral.sh/ruff/rules/#flake8-commas-com
+	- https://pypi.org/project/flake8-commas/
+
+  - Add flake8-builtins (A)
+
+	- https://docs.astral.sh/ruff/rules/#flake8-builtins-a
+	- https://pypi.org/project/flake8-builtins/
+
+  - Add flake8-errmsg (EM)
+
+	- https://pypi.org/project/flake8-errmsg/
+	- https://pypi.org/project/flake8-errmsg/
+
 ### CI
 
 - Move CodeQL from advanced configuration file to GitHub's default