Doc fixes as suggested

Author: stefanb

doc/go1.14.html

@@ -762,12 +762,12 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
 <dl id="net/url"><dt><a href="/pkg/net/url/">net/url</a></dt>
   <dd>
     <p><!-- CL 185117 -->
-      When parsing of an URL fails
+      When parsing of a URL fails
       (e.g. by <a href="/pkg/net/url/#Parse"><code>Parse</code></a>
       or <a href="/pkg/net/url/#ParseRequestURI"><code>ParseRequestURI</code></a>),
       the resulting <a href="/pkg/net/url/#Error.Error"><code>Error</code></a> message
-      will now quote the unparsable URL
-      for clearer structure and consistency with other parsing errors.
+      will now quote the unparsable URL.
+      This provides clearer structure and consistency with other parsing errors.
     </p>
   </dd>
 </dl><!-- net/url -->