* lua-doc: Fix fs.find_all documentation
It returns an array, not a string. Also document return information.
* lua-doc: Remove TODO for fs.verify_with_sha_file
No reason to add fs.read_file errors here as that function gets
pcall-ed. If it fails, nil gets returned.
* lua-doc: Consistently refer to tables/arrays as tables
That's what they're called within Lua all the time.
* lua-doc: fix incorrect references to util module