Overdraw optimization can leave artifacts

[dnfield]

This svg:

<svg xmlns="http://www.w3.org/2000/svg" 
    xmlns:xlink="http://www.w3.org/1999/xlink" style="isolation:isolate" viewBox="57 42 20 20">
    <g>
        <g>
            <path d=" M 77 49.767 L 74.095 49.767 L 74.095 44.905 L 69.233 44.905 L 69.233 42 L 77 42 L 77 49.767 Z " fill="rgb(111,161,234)"/>
            <rect x="70.937" y="42.145" width="2.905" height="8.93" transform="matrix(-0.707,-0.707,0.707,-0.707,90.618,130.756)" fill="rgb(111,161,234)"/>
        </g>
    </g>
</svg>

[dnfield]

In this case, because the paths are the same color, we could safely merge them instead of creating distinct ones. If they were different colors, we could not and would end up with these AA related issues.