Documentation clarification for serializing to plain text

[alex-breen]

Issue:
When serializing to plain text, using Node.string, (as documented here: https://docs.slatejs.org/concepts/10-serializing), nodes with children of type "list-items"(e.g. "bulleted-list") are not separated by a space or new line. This can result in two distinct words being concatenated into one nonsense word.

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For Example:
Content:

Regular Line

• First Bullet
• Second Bullet

Slate JSON:

[{"type":"paragraph","children":[{"text":"Regular line"}]},{"type":"bulleted-list","children":[{"type":"list-item","children":[{"text":"First bullet "}]},{"type":"list-item","children":[{"text":"Second bullet"}]}]}]

Plain text result ("bulletSecond"):

Regular line First bulletSecond bullet

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So instead of using this code from the documentation:

const serialize = nodes => {
    return nodes.map(n => Node.string(n)).join('\n')
}

I implemented the following:

const serializeToPlainText = (nodes) => {
    if (Text.isText(nodes)) {
        return nodes.text
    } else if (Node.isNodeList(nodes)) {
        return nodes.map(n => serializeToPlainText(n)).join(' ')
    } else {
        return nodes.children.map(n => serializeToPlainText(n)).join(' ')
    }
}

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I have posted this in case it is useful to others (and also in case anyone recognizes something I've missed).