Awkward unrelated comment alignment

[jdm]

Before:

        let normalized = self.ctfont.all_traits().normalized_weight();  // [-1.0, 1.0]
        // TODO(emilio): It may make sense to make this range [.01, 10.0], to
        // align with css-fonts-4's range of [1, 1000].

After:

        let normalized = self.ctfont.all_traits().normalized_weight(); // [-1.0, 1.0]
                                                                       // TODO(emilio): It may make sense to make this range [.01, 10.0], to
                                                                       // align with css-fonts-4's range of [1, 1000].

[scampi]

Add example from #3431 as test