Git exclude patterns with full static file, without globs, fails to capture the exclusion (the file is added anyway

Good afternoon,

This was very confusing to track down, I can't find any documentation that showcases this as intended behaviour.

I reviewed the pathspec docs quite a few times.

Thank you for filling out a Git bug report!
Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)
I executed 

`git add -A ':(exclude,glob)lib/power.rb'`

What did you expect to happen? (Expected behavior)
The file `lib/power.rb` is excluded

What happened instead? (Actual behavior)
The file `lib/power.rb` is added to staging
However, if I run
`git add -A ':(exclude,glob)lib/power\.rb'`

The file is excluded correctly

What's different between what you expected and what actually happened?

Anything else you want to add:

If I use 
`git add -A ':(exclude,glob)lib/*ower.rb'` the file is also excluded correctly, which makes this even more confusing



Please review the rest of the bug report below.
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[System Info]
git version:
git version 2.45.1
cpu: arm64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
feature: fsmonitor--daemon
uname: Darwin 23.5.0 Darwin Kernel Version 23.5.0: Wed May  1 20:19:05 PDT 2024; root:xnu-10063.121.3~5/RELEASE_ARM64_T8112 arm64
compiler info: clang: 15.0.0 (clang-1500.3.9.4)
libc info: no libc information available
$SHELL (typically, interactive shell): /bin/zsh