Fix mcl_signs automatic newline behavior once you have reached the 15char per line limit.

mods/ITEMS/mcl_signs/init.lua

@@ -65,6 +65,10 @@ local string_to_line_array = function(str)
 			current = current + 1
 			tab[current] = ""
 			linechar = 1
+		elseif linechar == LINE_LENGTH + 1 then --proper newline long text
+			current = current + 1
+			tab[current] = char
+			linechar = 1
 		else
 			tab[current] = tab[current]..char
 			linechar = linechar + 1
@@ -92,7 +96,7 @@ local generate_line = function(s, ypos)
 	local width = 0
 	local chars = 0
 	local printed_char_width = CHAR_WIDTH + 1
-	while chars < LINE_LENGTH and i <= #s do
+	while chars < LINE_LENGTH + 1 and i <= #s do
 		local file = nil
 		-- Get and render character
 		if charmap[s:sub(i, i)] ~= nil then