chore: regens API reference docs (#889)

diff --git a/docs/epy/googleapiclient.http.BatchHttpRequest-class.html b/docs/epy/googleapiclient.http.BatchHttpRequest-class.html
index e4d512a..5d953b9 100644
--- a/docs/epy/googleapiclient.http.BatchHttpRequest-class.html
+++ b/docs/epy/googleapiclient.http.BatchHttpRequest-class.html
@@ -58,14 +58,7 @@
 <!-- ==================== CLASS DESCRIPTION ==================== -->
 <h1 class="epydoc">Class BatchHttpRequest</h1><p class="nomargin-top"><span class="codelink"><a href="googleapiclient.http-pysrc.html#BatchHttpRequest">source&nbsp;code</a></span></p>
 <center>
-<center>  <map id="uml_class_diagram_for_googleap_24" name="uml_class_diagram_for_googleap_24">
-<area shape="rect" id="node1_3" href="googleapiclient.http.BatchHttpRequest-class.html#__init__" title="Constructor for a BatchHttpRequest." alt="" coords="17,37,327,57"/>
-<area shape="rect" id="node1_4" href="googleapiclient.http.BatchHttpRequest-class.html#add" title="Add a new request." alt="" coords="17,57,327,77"/>
-<area shape="rect" id="node1_5" href="googleapiclient.http.BatchHttpRequest-class.html#execute" title="Execute all the requests as a single batched HTTP request." alt="" coords="17,77,327,97"/>
-<area shape="rect" id="node1" href="googleapiclient.http.BatchHttpRequest-class.html" title="Batches multiple HttpRequest objects into a single HTTP request." alt="" coords="5,5,339,104"/>
-</map>
-  <img src="uml_class_diagram_for_googleap_24.gif" alt='' usemap="#uml_class_diagram_for_googleap_24" ismap="ismap" class="graph-without-title" />
-</center>
+
 </center>
 <hr />
 <pre class="literalblock">
@@ -666,7 +659,7 @@
   request: list, list of request objects to send.
 
 Raises:
-  httplib2.HttpLib2Error if a transport error has occured.
+  httplib2.HttpLib2Error if a transport error has occurred.
   googleapiclient.errors.BatchError if the response is the wrong format.
 
 </pre>
@@ -701,7 +694,7 @@
   None
 
 Raises:
-  httplib2.HttpLib2Error if a transport error has occured.
+  httplib2.HttpLib2Error if a transport error has occurred.
   googleapiclient.errors.BatchError if the response is the wrong format.
 
 </pre>
@@ -740,7 +733,7 @@
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-    Generated by Epydoc 3.0.1 on Fri Jun 14 15:57:28 2019
+    Generated by Epydoc 3.0.1 on Thu Apr 30 17:06:05 2020
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