BIC method: Improve RegEx, {1} is always redundant. Closes gh-744

additional-methods.js

@@ -290,7 +290,7 @@ jQuery.validator.addMethod("iban", function(value, element) {
  * - Last 3 characters - branch code, optional (shall not start with 'X' except in case of 'XXX' for primary office) (letters and digits)
  */
 jQuery.validator.addMethod("bic", function(value, element) {
-    return this.optional( element ) || /^([A-Z]{6}[A-Z2-9]{1}[A-NP-Z1-2]{1})(X{3}|[A-WY-Z0-9]{1}[A-Z0-9]{2})?$/.test( value );
+    return this.optional( element ) || /^([A-Z]{6}[A-Z2-9][A-NP-Z1-2])(X{3}|[A-WY-Z0-9][A-Z0-9]{2})?$/.test( value );
 }, "Please specify a valid BIC code");
 
 jQuery.validator.addMethod("dateNL", function(value, element) {