```ruby
# frozen_string_literal: true

# The RichText record holds the content produced by the Trix editor in a serialized `body` attribute.
# It also holds all the references to the embedded files, which are stored using Active Storage.
# This record is then associated with the Active Record model the application desires to have
# rich text content using the `has_rich_text` class method.
module ActionText
  class RichText < ActiveRecord::Base
    self.table_name = "action_text_rich_texts"

    serialize :body, ActionText::Content
    delegate :to_s, :nil?, to: :body

    belongs_to :record, polymorphic: true, touch: true
    has_many_attached :embeds

    before_save do
      self.embeds = body.attachments.map(&:attachable) if body.present?
    end

    def to_plain_text
      body&.to_plain_text.to_s
    end

    delegate :blank?, :empty?, :present?, to: :to_plain_text
  end
end
```

Fix API docs of `ActionText::RichText`
user
```ruby
# frozen_string_literal: true

module ActionText
  # The RichText record holds the content produced by the Trix editor in a serialized `body` attribute.
  # It also holds all the references to the embedded files, which are stored using Active Storage.
  # This record is then associated with the Active Record model the application desires to have
  # rich text content using the `has_rich_text` class method.
  class RichText < ActiveRecord::Base
    self.table_name = "action_text_rich_texts"

    serialize :body, ActionText::Content
    delegate :to_s, :nil?, to: :body

    belongs_to :record, polymorphic: true, touch: true
    has_many_attached :embeds

    before_save do
      self.embeds = body.attachments.map(&:attachable) if body.present?
    end

    def to_plain_text
      body&.to_plain_text.to_s
    end

    delegate :blank?, :empty?, :present?, to: :to_plain_text
  end
end
```
assistant