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  Name:     trimlen() - get length of string as if trimmed()
  Usage:    <integer> = trimlen(<string>)
  Params:   string <string> - the string to check
  Returns:  integer equal to the length of the string without
            trailing spaces.

 ---------------------------------- Example ---------------------------------

                 ? len(trim("   this is the string    "))
                 * prints 21

                 ? trimlen("   this is the string    ")
                 * prints 21