Features

Better Path Output

Using the -v option, formatting will print all formatted paths to stdout. With the new debug code -debug diffs formatting will print all the formatted diffs (same as -dry except the formatting will actually occur).

Force Array Style

With the formatter option force_array_style you can force flow ([x]) or block (- x) style arrays. With either option chosen, all arrays in the document will be the configured style.

Bug Fixes

Using alias node as a key

When using an alias node (*alias) as a key, yaml.v3 broke the YAML spec and output an invalid document. See this comment on the original issue for an explanation.

The default behaviour now fixes this, but in case it causes any unexpected side effects there is a formatter option added called disable_alias_key_correction.