I would rewrite this parenthetical, because 'above" is very ambiguous. I think saying "(While `<textline />` is supported, its use is extremely discouraged. We urge usage of `<formulaequationinput />`. See the opening paragraphs of the Numerical Response section for more information.)" is better. Best would be if you could link to the top of the Numerical Response section but not sure if rst supports links.