Small fixes

cgi.html

@@ -172,11 +172,11 @@ end</code></pre>
         <p>
         In the example request we mentioned above
         (<code>example.com/calculator.html?a=10&amp;b=32</code>), the part
-        starting from the question mark, <code>?a=10&amp;b=32</code> is the
+        starting from the question mark, <code>?a=10&amp;b=32</code>, is the
         <i>query string</i>. This is how users can submit parameters with their
         web requests. Usually these parameters are set by e.g. a form on your
         website, but in our simple example we'll be just manually manipulating
-        the query string.
+        the URL.
         </p>
 
         <p>