Add :yank command.

common/locale/en-US/cmdline.xml

@@ -210,6 +210,7 @@
                 <li><ex>:vmap</ex></li>
                 <li><ex>:vnoremap</ex></li>
                 <li><ex>:winopen</ex></li>
+                <li><ex>:yank</ex></li>
             </ul>
         </p>
     </description>

common/locale/en-US/index.xml

@@ -351,6 +351,7 @@ This file contains a list of all available commands, mappings and options.
     <dt><ex>:winonly</ex></dt> <dd>Close all other windows</dd>
     <dt><ex>:winopen</ex></dt> <dd>Open one or more URLs in a new window</dd>
     <dt><ex>:wqall</ex></dt> <dd>Save the session and quit</dd>
+    <dt><ex>:yank</ex></dt> <dd>Yanks the output of the given command to the clipboard.</dd>
     <dt><ex>:zoom</ex></dt> <dd>Set zoom value of current web page</dd>
 </dl>
 

common/locale/en-US/various.xml

@@ -110,6 +110,14 @@
     </description>
 </item>
 
+<item>
+    <tags>:yank :y</tags>
+    <spec>:y[ank] <a>cmd</a></spec>
+    <description>
+        <p>Yanks the output of the given command to the clipboard.</p>
+    </description>
+</item>
+
 <h2 tag="privacy">Privacy and sensitive information</h2>
 
 <p>