BlockAutoformatEditing and InlineAutoformatEditing does not have docs for pluginName property

[tomalec]

📝 Provide a description of requested docs changes

As you can see below pluginName property does not have any docs for BlockAutoformatEditing and InlineAutoformatEditing

• https://ckeditor.com/docs/ckeditor5/latest/api/module_autoformat_inlineautoformatediting-InlineAutoformatEditing.html#static-member-pluginName
• https://ckeditor.com/docs/ckeditor5/latest/api/module_autoformat_blockautoformatediting-BlockAutoformatEditing.html#static-member-pluginName

These properties were added at 3879b03 with @inheritDoc, but the thing is both classes do not inherit from anything.
https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-autoformat/src/blockautoformatediting.js#L23

Personally, I don't get the design pattern there. They only have a constructor() defined, which does a lot, and the instances returned from constructors are not used anywhere.

Given the instances are not stored anywhere, I'm not sure why pluginName is even needed?

[Reinmar]

Those properties can be removed as these are not plugins.

[jodator]

My 2 cents: Yep it looks like those can be simple functions - we use that pattern everywhere else.

Personally I don't like creating objects that are not referenced anywhere so it would be nice to refactor that (if we have time, etc).

[tomalec]

If we're about to do small refactoring, I'd add simplifying arguments handling to the list.

Currently, there is a logic to support, various types of arguments like: testRegexpOrCallback, attributeOrCallback, even though, the only case we actually use is: testRegexp, callback

[Reinmar]

Let's cover that in #1239.