Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/pubsub_v1beta1a.topics.html b/docs/dyn/pubsub_v1beta1a.topics.html
index 0fcb01e..b68e55f 100644
--- a/docs/dyn/pubsub_v1beta1a.topics.html
+++ b/docs/dyn/pubsub_v1beta1a.topics.html
@@ -72,7 +72,7 @@
 
 </style>
 
-<h1><a href="pubsub_v1beta1a.html">Google Cloud Pub/Sub API</a> . <a href="pubsub_v1beta1a.topics.html">topics</a></h1>
+<h1><a href="pubsub_v1beta1a.html">Cloud Pub/Sub API</a> . <a href="pubsub_v1beta1a.topics.html">topics</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#create">create(body, x__xgafv=None)</a></code></p>