Go Challenge tests changed after the start

<blockquote> <p>3rd April 2015: Guillaume has made 2 changes to the test files:</p> <p>The first change is minor and concerns Window user with dual stack. He has changed the net.Listen(&#34;tcp&#34;, &#34;:0&#34;) to net.Listen(&#34;tcp&#34;, &#34;127.0.0.1:0&#34;). This shouldn&#39;t change anything for most people.</p> <p>The second is more problematic and would impact people using io.Copy. In TestReadWritePing, he has moved the w.Close() in the writing goroutine just like in the other tests.</p> </blockquote> <p><a href="https://gist.github.com/creack/333f89f6aec5b789c1a0/revisions">https://gist.github.com/creack/333f89f6aec5b789c1a0/revisions</a></p> <hr/>**评论：**<br/><br/>captncraig: <pre><p>Thanks for the heads up. </p></pre>