code:     public static String stripExpressionIfAltSyntax(ValueStack stack, String expr) {
          if (altSyntax(stack)) {
              // does the expression start with %{ and end with }? if so, just cut it off!
              if (isExpression(expr)) {
                  return expr.substring(2, expr.length() - 1);
              }
          }
          return expr;
      }
  
      /**
       * Is the altSyntax enabled? [TRUE]
       *
       * @param stack the ValueStack where the context value is searched for.
       * @return true if altSyntax is activated. False otherwise.
       *         See <code>struts.properties</code> where the altSyntax flag is defined.
       */
  