Corrected UTF-8 character

Author: javadev

src/main/java/com/github/underscore/Json.java

@@ -404,8 +404,8 @@ private static void escape(String s, StringBuilder sb) {
                     case '\t':
                         sb.append("\\t");
                         break;
-                    case '€':
-                        sb.append('€');
+                    case '\u20AC':
+                        sb.append('\u20AC');
                         break;
                     default:
                         if (ch <= '\u001F'

src/main/java/com/github/underscore/Xml.java

@@ -1029,7 +1029,7 @@ private static void escape(String s, StringBuilder sb) {
                     case '\t':
                         sb.append("\t");
                         break;
-                    case '€':
+                    case '\u20AC':
                         sb.append("€");
                         break;
                     default: