Fix Mixed Tabs: when present, causes flickering in git diff compare

[dylbarne]

Underlying issue behavior is exactly what is discussed/described here: https://developercommunity.visualstudio.com/t/Screen-Flickering-in-Git-Compare/1532963

later comments have claimed this issue is fixed, however, I am still experiencing the same issue behavior with latest version of Visual Studio; I have identified at least for my case this behavior to be caused by Fix Mixed Tabs extension.

To Reproduce:
Have current working file contain mixed tabs & spaces such that extension popup will occur:

Open this file in git diff compare, with native VS Git Changes built-in compare tool

Same popup will appear in right-hand side for Working tree copy, observe that flickering described in issue link occurs in bottom of left-hand side index/current file
Note: file length has to exceed height of window, causing need for scrolling to see entire contents of files being compared
Closing the Fix Mixed Tabs extension popup on right-hand side for Working tree copy will cause the flickering on left-hand side to stop.

[olegtk]

Thank you for reporting this, @dylbarne ! FYI @AmadeusW.

Yes, we recently learned the diff flickering is not completely fixed, @AmadeusW is investigating it as https://developercommunity.visualstudio.com/t/vertical-scroll-bar-trembles-in-top-posi/10849321.