A missing "of"

[FakhriAz]

AppFlowy-Docs/blog-highlights/demystifying-appflowy-editors-codebase.md

Line 738 in f3bd77d

If you have experience of writing widget tests in Flutter, you will be aware that typically you want to [pump](https://docs.flutter.dev/cookbook/testing/widget/introduction#notes-about-the-pump-methods) the widget that you want to test. However, for AppFlowy, this pump logic is already taken care by the TestableEditor class we mentioned above. So to pump the widget under test we call the following method:

Inaccurate: this pump logic is already taken care by the
Accurate: this pump logic is already taken care of by the