Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/epy/googleapiclient.http-module.html b/docs/epy/googleapiclient.http-module.html
index abd7dbf..f74aea3 100644
--- a/docs/epy/googleapiclient.http-module.html
+++ b/docs/epy/googleapiclient.http-module.html
@@ -357,6 +357,13 @@
         <a name="MAX_URI_LENGTH"></a><span class="summary-name">MAX_URI_LENGTH</span> = <code title="2048">2048</code>
     </td>
   </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="MAX_BATCH_LIMIT"></a><span class="summary-name">MAX_BATCH_LIMIT</span> = <code title="1000">1000</code>
+    </td>
+  </tr>
 <tr class="private">
     <td width="15%" align="right" valign="top" class="summary">
       <span class="summary-type">&nbsp;</span>
@@ -605,7 +612,7 @@
 <table border="0" cellpadding="0" cellspacing="0" width="100%%">
   <tr>
     <td align="left" class="footer">
-    Generated by Epydoc 3.0.1 on Fri Jun 14 13:09:01 2019
+    Generated by Epydoc 3.0.1 on Fri Jun 14 15:57:27 2019
     </td>
     <td align="right" class="footer">
       <a target="mainFrame" href="http://epydoc.sourceforge.net"