Formatting Custom Display Name Handler

[AntumDeluge]

trafficstars

This is part of my config.ld:

new_type('chatcmd', 'Chat Commands', false, 'chatparam')
custom_tags = {
	{'chatparam', title='Parameters',},
}

local function chatcmd_handler(item)
	local output = item.name
	for i, p in ipairs(item.tags.chatparam) do
		output = output .. ' [' .. p .. ']'
	end
	
	return output
end

function custom_display_name_handler(item, default_handler)
	if item.type == 'chatcmd' then
		return chatcmd_handler(item)
	end
	
	return default_handler(item)
end

My problem is in the chatcmd_handler function. For each item.tags.chatparam, I want to take only the first word & append it to the output, not the entire string. Similar to the way functions are displayed. But I am not sure how to split the string or extract a substring. I don't seem to be able to use standard Lua libraries from within the config.ld. I am not very experienced with Lua, but I have dabbled in it for a few months, including interactive interpreters.