gitignore pattern matching issue with Windows

[TDD Guru <tddguru@xxxxxxxxx>]

  Git does not seem to properly handle the pattern [AB] but it does handle [ab].

Here is the demonstration of the bug:

C:\gitbug>git --version
git version 2.50.1.windows.1

C:\gitbug>echo [ab] > .gitignore

C:\gitbug>type .gitignore
[ab]

C:\gitbug>git check-ignore -v a
.gitignore:1:[ab]       a

C:\gitbug>git check-ignore -v b
.gitignore:1:[ab]       b

C:\gitbug>git check-ignore -v A
.gitignore:1:[ab]       A

C:\gitbug>git check-ignore -v B
.gitignore:1:[ab]       B

C:\gitbug>echo [AB] > .gitignore

C:\gitbug>type .gitignore
[AB]

C:\gitbug>git check-ignore -v a

C:\gitbug>git check-ignore -v b

C:\gitbug>git check-ignore -v A

C:\gitbug>git check-ignore -v B

C:\gitbug>git config core.ignorecase
true

C:\gitbug>ver

Microsoft Windows [Version 10.0.19045.6093]

C:\gitbug>

Rex McCarthy