Send the original value of the str parameter to the quotes function

papaparse.js

@@ -447,17 +447,17 @@ License: MIT
 			if (str.constructor === Date)
 				return JSON.stringify(str).slice(1, 25);
 
-			str = str.toString().replace(quoteCharRegex, _escapedQuote);
+			var escapedQuoteStr = str.toString().replace(quoteCharRegex, _escapedQuote);
 
 			var needsQuotes = (typeof _quotes === 'boolean' && _quotes)
 							|| (typeof _quotes === 'function' && _quotes(str, col))
 							|| (Array.isArray(_quotes) && _quotes[col])
-							|| hasAny(str, Papa.BAD_DELIMITERS)
-							|| str.indexOf(_delimiter) > -1
-							|| str.charAt(0) === ' '
-							|| str.charAt(str.length - 1) === ' ';
+							|| hasAny(escapedQuoteStr, Papa.BAD_DELIMITERS)
+							|| escapedQuoteStr.indexOf(_delimiter) > -1
+							|| escapedQuoteStr.charAt(0) === ' '
+							|| escapedQuoteStr.charAt(escapedQuoteStr.length - 1) === ' ';
 
-			return needsQuotes ? _quoteChar + str + _quoteChar : str;
+			return needsQuotes ? _quoteChar + escapedQuoteStr + _quoteChar : escapedQuoteStr;
 		}
 
 		function hasAny(str, substrings)