Fixes #7596 when PR #103 is merged.

Describe the pull request

It seems there's an issue with the handling of special characters in wiki names, where Git internally escapes them. This creates a mismatch between the escaped filenames and the actual filenames, making it challenging to delete files accurately. As a result, the deletion process is not functioning as expected.

Including the -z option in the git ls-tree command results in filenames being presented without quotes.
Another pull request has been initiated to handle this specific case. Please check git-module PR #103 for details.

For example, I have created below test wikis:

See the differences of using -z:

Using -z the filename is output verbatim.

Link to the issue: #7596

Checklist

• I agree to follow the Code of Conduct by submitting this pull request.
• I have read and acknowledge the Contributing guide.
• I have added test cases to cover the new code or have provided the test plan.

Test plan

Make sure gogs/git-module has PR #103 changes. And gogs/gogs has this PR changes.

Build(go build -o gogs) and start the gogs web server(./gogs web).
Create wiki pages(with characters like ", \ etc,.) and test the fix.