Tkinter tests fail with Tk 8.7, 9.0 and 9.1 #145736
Description
I build Python with the latest versions of Tk 8.7, 9.0 and 9.1. Multiple Tkinter tests fail (mostly the configure tests). Last time the tests were updated for pre-release version of Tk 8.7, this can be reason. Also, some fine details can be changed in bugfix releases.
Looking at the code, the past attempts to fix tests for 8.7 and 9.0 make some cases to be just omitted for new Tk versions, or replaced by tests for already covered cases. I tried to fix this too, and simplify the tests code.