func Render(source string, ctx interface{}) (string, error) {
	tpl, err := Parse(source)
	if err != nil {
		return "", err
	}
	str, err := tpl.Exec(ctx)
	if err != nil {
		return "", err
	}
	return str, nil
}
Render parses a template and evaluates it with given context

Note that this function call is not optimal as your template is parsed everytime you call it. You should use Parse() function instead.
package raymond