Migrate diff-match-patch to a modern fork

[Leilei332]

Important

This PR is not backward compatible due to API changes

The original diff-match-patch repository is now archived. This PR migrates it to diff-match-patch-es which is more modern and uses pure functions instead of one object.

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Confirmed: Leilei332 has already signed the Contributor License Agreement (see contributing.md)

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⚠️ Impact: $:/changenotes/5.4.0/#9511/impacts/api

Impact Type: compatibility-break
Related Change: $:/changenotes/5.4.0/#9511

The diff-match-patch-es library uses different APIs

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📝 $:/changenotes/5.4.0/#9511

Type: enhancement | Category: developer
Release: 5.4.0

Migrate diff-match-patch library to diff-match-patch-es

🔗 #9511

👥 Contributors: Leilei332

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[pmario]

Do we have tests for diff-match-patch?

[Leilei332]

Do we have tests for diff-match-patch?

The original respository does have tests. IMO it's up to the library author to test the library. For tiddlywiki, we may add tests for diff-text widget and some operators using this library.

[pmario]

The current preview https://tiddlywiki.com/prerelease/#DiffTextWidget
behaves different than the new library here in the PR. So there seems to be a difference, that breaks the diffText widget. See the second example with the slider. It seems not to work with this PR

[pmario]

There is the https://deploy-preview-9511--tiddlywiki-previews.netlify.app/#makepatches%20and%20applypatches%20Operator%20(Examples) tiddler. If we could convert the examples to testcase widgets at tw-com, they will be picked up by our test runner.

So we can have both. New test, that also work as documentation.

[Leilei332]

Looks like we already have tests for diff-match-patch operators in test-filters.js:

[Jermolene]

Thank you @Leilei332. I think that this is a worthwhile change. It's hard to assess the backwards compatibility impact, but any errors it raises should be simple to diagnose. Having said that it would be helpful if we had an automated way to scan publicly published plugins.