For config files, comments have been changed to be associated to a section node, simple node or invalid node. This reduces the complexity of updating the config and allows comments to be deleted or changed. They will only be added if the actual node is deleted. Void nodes are now no longer taken into account.

To allow saving of nodes with comments, a new getAsStrings method has been added, which serializes the node and its comments to a string format. This allows the node to be added to a config. Since the functionality of save(PrintWriter) does not support this, and to allow developers to use a writer of their own choosing, this method has been deprecated.

Due to the previously mentioned complexity of the Node classes, adding a node at an index during the updating process would have an unreliable result. To fix this, a new addRelative method has been added, which now adds a Node correctly. Since this requires ignoring void nodes, its behaviour differs from add.

In an attempt to clean up SectionNode, the node parsing logic has been moved to a static nested class. Furthermore, documentation has been added. This is a good setup to allow someone to improve this quite messy code down the line.

In an attempt to standardize our config format with existing formats, and to reduce the complexity of finding/associating comments, config comments now appear before the key of the node.