First file translated to lua

source/utilities.lua

@@ -0,0 +1,20 @@
+local String = require(script.Parent.string)
+
+return { 
+	stringEncaseCRLFWithFirstIndex = function(str, prefix, postfix, index)
+		local endIndex = 1
+		local returnValue = ""
+		repeat
+			local gotCR = string.sub(str, index - 1, index - 1) == "\r"
+			returnValue ..= String.slice(str, endIndex, if gotCR then index - 2 else index - 1) .. prefix .. (if gotCR
+			then "\r\n"
+			else "\n") .. postfix
+		endIndex = index + 1
+		-- TODO: add String.indexOf and use it here
+		index = string.find(string_, "\n", endIndex)
+		until index == nil
+
+	returnValue += String.slice(str, endIndex)
+	return returnValue
+end
+}