🚀 Minimize the number of highlighted blocks

[duongdominhchau]

Here we can see delta highlights three blocks, but in this case only two is enough to show the change: one for <a id="Seconds.fraction"> and one for </a>. In this example, we can reduce the number of highlighted blocks by moving these blocks to the left as far as possible and merge.

[dandavison]

Hi @duongdominhchau, thanks for this. You're definitely right that the highlighting algorithm could be improved, and your example is very helpful. So it's a worthwhile project for me or anyone else to work on! #246 is similar, and #140 is related.

[dandavison]

I'm going to close this one and keep #246 as the primary ticket for this work, but thanks for the additional detail here.