Don&#x27;t listen to me—I don&#x27;t know anything about good API design.  (That&#x27;s not sarcasm or modesty, but the simple truth.)  However, if the self-diagnosed biggest mistake of Tim Berners-Lee&#x27;s <i>life</i> was to add a <i>single</i> extra character to a commonly typed string, then surely one has to consider that the addition of <i>two</i> extra characters could eventually also be judged a mistake?