Fix Git detection in filemanager.lua (thanks to humannum14916)

Author: omarelladen

filemanager-plugin/filemanager.lua

@@ -72,15 +72,15 @@ end
 local function get_ignored_files(tar_dir)
 	-- True/false if the target dir returns a non-fatal error when checked with 'git status'
 	local function has_git()
-		local git_rp_results = shell.ExecCommand('git  -C "' .. tar_dir .. '" rev-parse --is-inside-work-tree')
+		local git_rp_results = shell.ExecCommand('git', '-C', tar_dir, 'rev-parse', '--is-inside-work-tree')
 		return git_rp_results:match("^true%s*$")
 	end
 	local readout_results = {}
 	-- TODO: Support more than just Git, such as Mercurial or SVN
 	if has_git() then
 		-- If the dir is a git dir, get all ignored in the dir
 		local git_ls_results =
-			shell.ExecCommand('git -C "' .. tar_dir .. '" ls-files . --ignored --exclude-standard --others --directory')
+			shell.ExecCommand('git', '-C', tar_dir, 'ls-files', '.', '--ignored', '--exclude-standard', '--others', '--directory')
 		-- Cut off the newline that is at the end of each result
 		for split_results in string.gmatch(git_ls_results, "([^\r\n]+)") do
 			-- git ls-files adds a trailing slash if it's a dir, so we remove it (if it is one)