build: run docs regen in synth.py (#1059)

diff --git a/docs/dyn/pubsub_v1.projects.topics.snapshots.html b/docs/dyn/pubsub_v1.projects.topics.snapshots.html
index 1cc113e..1e694eb 100644
--- a/docs/dyn/pubsub_v1.projects.topics.snapshots.html
+++ b/docs/dyn/pubsub_v1.projects.topics.snapshots.html
@@ -78,7 +78,7 @@
   <code><a href="#close">close()</a></code></p>
 <p class="firstline">Close httplib2 connections.</p>
 <p class="toc_element">
-  <code><a href="#list">list(topic, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(topic, pageToken=None, pageSize=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists the names of the snapshots on this topic. Snapshots are used in [Seek](https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
@@ -90,13 +90,13 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(topic, pageSize=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(topic, pageToken=None, pageSize=None, x__xgafv=None)</code>
   <pre>Lists the names of the snapshots on this topic. Snapshots are used in [Seek](https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.
 
 Args:
   topic: string, Required. The name of the topic that snapshots are attached to. Format is `projects/{project}/topics/{topic}`. (required)
-  pageSize: integer, Maximum number of snapshot names to return.
   pageToken: string, The value returned by the last `ListTopicSnapshotsResponse`; indicates that this is a continuation of a prior `ListTopicSnapshots` call, and that the system should return the next page of data.
+  pageSize: integer, Maximum number of snapshot names to return.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -106,10 +106,10 @@
   An object of the form:
 
     { # Response for the `ListTopicSnapshots` method.
+    &quot;nextPageToken&quot;: &quot;A String&quot;, # If not empty, indicates that there may be more snapshots that match the request; this value should be passed in a new `ListTopicSnapshotsRequest` to get more snapshots.
     &quot;snapshots&quot;: [ # The names of the snapshots that match the request.
       &quot;A String&quot;,
     ],
-    &quot;nextPageToken&quot;: &quot;A String&quot;, # If not empty, indicates that there may be more snapshots that match the request; this value should be passed in a new `ListTopicSnapshotsRequest` to get more snapshots.
   }</pre>
 </div>