<p>Though the comment was unnecessary, aworldapart’s use of the single quotation is legit. </p>
<p>This forum makes it impossible to differentiate between an apostrophe and an inverted comma, which is used for quotation marks.</p>
<p>Additionally, placing the comma before the quotation is a matter of tradition and style. American rules, British rules, and scientific rules all have differing viewpoints, so it doesn’t matter as long as one is consistent.</p>
<p>[Quotation</a> mark - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Quotation_mark]Quotation”>Quotation mark - Wikipedia)</p>