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Third bullet under Keyboard Interaction says "When the message area of a dialog is focusable and has focus, a visual focus indicator around the message is recommended. " Recommend changing to "When the message area of a dialog is focusable and has focus, a visual focus indicator is required. "
Change the bullet to read: When the message area of a dialog is focusable and has focus, a visual focus indicator is required, and it is recommended that the indicator encompass the complete message.