* Add yamllint check for RST code listings.
* Address review comments.
* Sort languages and remove no longer needed duplicates.
* Enable warnings, but disable all failing rules.
* Improve formulation.
Co-authored-by: Don Naro <dnaro@redhat.com>
* Show allowed languages when no or invalid language is supplied. Improve line lengths.
* Make sure that 'yamllint .' passes.
* Fix indentation issues introduced in #2095.
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Co-authored-by: Don Naro <dnaro@redhat.com>
This commit extends YAML linting by enabling standard rules from the
`yamllint` tool [1]. Since syntax errors and key duplicates are already
checked since 4d48711, this change only adds detection for cosmetic
problems. It also narrows checks to the test/ dir only.
The main goal is to prevent future problems to enter the code base
without being noticed. While it would be a huge effort to be PEP8
compliant, it is relatively easy to have correct YAML style *now* and
prevent future errors by enabling linting.
Note: for those (like me) caring about code attribution: use `git blame
-w` to ignore whitespace-only changes.
Note: I disabled some linting checks (such as indentation), they can be
enforced in the future if needed. Similarly, current checks can also be
disabled. See the `.yamllint` file.
[1]: https://yamllint.readthedocs.io/
