Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/epy/toc-googleapiclient.http-module.html b/docs/epy/toc-googleapiclient.http-module.html
index 1221469..9f32559 100644
--- a/docs/epy/toc-googleapiclient.http-module.html
+++ b/docs/epy/toc-googleapiclient.http-module.html
@@ -43,7 +43,8 @@
     <a target="mainFrame" href="googleapiclient.http-module.html#DEFAULT_CHUNK_SIZE"
      >DEFAULT_CHUNK_SIZE</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#DEFAULT_HTTP_TIMEOUT_SEC"
      >DEFAULT_HTTP_TIMEOUT_SEC</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#LOGGER"
-     >LOGGER</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#MAX_URI_LENGTH"
+     >LOGGER</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#MAX_BATCH_LIMIT"
+     >MAX_BATCH_LIMIT</a><br />    <a target="mainFrame" href="googleapiclient.http-module.html#MAX_URI_LENGTH"
      >MAX_URI_LENGTH</a><br />  <div class="private">
     <a target="mainFrame" href="googleapiclient.http-module.html#_LEGACY_BATCH_URI"
      >_LEGACY_BATCH_URI</a><br />  </div>