fix: Discard git ls-files output

[dan-woz]

Current version creates a file named nul in my current working directory. I think the intention is to discard this output instead.

[Copilot]

Pull Request Overview

This PR fixes an issue where the git ls-files command was incorrectly redirecting stderr to a file named "nul" instead of properly discarding the output. The fix changes the redirection from 2>nul to 2>/dev/null to properly suppress error messages.

• Changed stderr redirection from creating a "nul" file to discarding output via /dev/null

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[Copilot]

The fix uses /dev/null which is Unix-specific and won't work on Windows. Consider using a cross-platform solution like 2>nul on Windows and 2>/dev/null on Unix, or check if the git command supports --quiet flag to suppress errors.

Suggested change

	local handle = io.popen("git ls-files 2>/dev/null")
	local dir_sep = package.config:sub(1,1)
	local null_redir = (dir_sep == '\\') and "2>nul" or "2>/dev/null"
	local handle = io.popen("git ls-files " .. null_redir)