chore: regens API reference docs (#889)

diff --git a/docs/epy/toc-everything.html b/docs/epy/toc-everything.html
index 3f32496..d8beb17 100644
--- a/docs/epy/toc-everything.html
+++ b/docs/epy/toc-everything.html
@@ -278,7 +278,8 @@
      >googleapiclient.discovery_cache.file_cache.EPOCH</a><br />    <a target="mainFrame" href="googleapiclient.discovery_cache.file_cache-module.html#FILENAME"
      >googleapiclient.discovery_cache.file_cache.FILENAME</a><br />    <a target="mainFrame" href="googleapiclient.discovery_cache.file_cache-module.html#LOGGER"
      >googleapiclient.discovery_cache.file_cache.LOGGER</a><br />    <a target="mainFrame" href="googleapiclient.discovery_cache.file_cache-module.html#cache"
-     >googleapiclient.discovery_cache.file_cache.cache</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#DEFAULT_CHUNK_SIZE"
+     >googleapiclient.discovery_cache.file_cache.cache</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#ConnectionError"
+     >googleapiclient.http.ConnectionError</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#DEFAULT_CHUNK_SIZE"
      >googleapiclient.http.DEFAULT_CHUNK_SIZE</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#DEFAULT_HTTP_TIMEOUT_SEC"
      >googleapiclient.http.DEFAULT_HTTP_TIMEOUT_SEC</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#LOGGER"
      >googleapiclient.http.LOGGER</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#MAX_BATCH_LIMIT"
@@ -295,7 +296,13 @@
     <a target="mainFrame" href="googleapiclient.mimeparse-module.html#__credits__"
      >googleapiclient.mimeparse.__credits__</a><br />    <a target="mainFrame" href="googleapiclient.mimeparse-module.html#__email__"
      >googleapiclient.mimeparse.__email__</a><br />    <a target="mainFrame" href="googleapiclient.model-module.html#LOGGER"
-     >googleapiclient.model.LOGGER</a><br />    <a target="mainFrame" href="googleapiclient.model-module.html#dump_request_response"
+     >googleapiclient.model.LOGGER</a><br />  <div class="private">
+    <a target="mainFrame" href="googleapiclient.model-module.html#_LIBRARY_VERSION"
+     >googleapiclient.model._LIBRARY_VERSION</a><br />  </div>
+  <div class="private">
+    <a target="mainFrame" href="googleapiclient.model-module.html#_PY_VERSION"
+     >googleapiclient.model._PY_VERSION</a><br />  </div>
+    <a target="mainFrame" href="googleapiclient.model-module.html#dump_request_response"
      >googleapiclient.model.dump_request_response</a><br /><hr />
 <span class="options">[<a href="javascript:void(0);" class="privatelink"
     onclick="toggle_private();">hide&nbsp;private</a>]</span>