html entities get unescaped

[RiedleroD]

I just had a svg break because I had a < in there and the optimizer just converted it into <. Luckily I was able to identify the problem and recover the svg, but this is a serious problem. For context, I had it in a tspan.

A solution would be adding a button to en/disable this feature or just removing it completely. I don't know your code so I can only assume things though.