```ruby
module FlagSettingsHelper
  def flag_settings_plot_lines(start_time, end_time=Time.now)
    setting_ids = FlagSetting.where(:name => ["max_flags", "min_accuracy"]).pluck(:id)

    audits = Audited::Audit.where(:auditable_type => "FlagSetting")
             .where(:action => "update")
             .where(:auditable_id => setting_ids)
             .where(:created_at => start_time..end_time)

    audits.map do |a|
      changes = a.audited_changes["value"]
      {"width" => '1', :value => a.created_at.to_i * 1000, :color => 'lightgrey',
        :label => { :text => "#{FlagSetting.find(a.auditable_id).name.humanize}: #{changes.first} -> #{changes.last}" },
        "zIndex" => 10 }
    end
  end
end
```

Use a real unicode arrow instead of ->
user
```ruby
module FlagSettingsHelper
  def flag_settings_plot_lines(start_time, end_time=Time.now)
    setting_ids = FlagSetting.where(:name => ["max_flags", "min_accuracy"]).pluck(:id)

    audits = Audited::Audit.where(:auditable_type => "FlagSetting")
             .where(:action => "update")
             .where(:auditable_id => setting_ids)
             .where(:created_at => start_time..end_time)

    audits.map do |a|
      changes = a.audited_changes["value"]
      {"width" => '1', :value => a.created_at.to_i * 1000, :color => 'lightgrey',
        :label => { :text => "#{FlagSetting.find(a.auditable_id).name.humanize}: #{changes.first} → #{changes.last}" },
        "zIndex" => 10 }
    end
  end
end
```
assistant