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

diff --git a/docs/dyn/books_v1.series.html b/docs/dyn/books_v1.series.html
index 9589970..3e8f11e 100644
--- a/docs/dyn/books_v1.series.html
+++ b/docs/dyn/books_v1.series.html
@@ -83,7 +83,7 @@
   <code><a href="#close">close()</a></code></p>
 <p class="firstline">Close httplib2 connections.</p>
 <p class="toc_element">
-  <code><a href="#get">get(series_id=None, x__xgafv=None)</a></code></p>
+  <code><a href="#get">get(series_id, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns Series metadata for the given series ids.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -92,11 +92,11 @@
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(series_id=None, x__xgafv=None)</code>
+    <code class="details" id="get">get(series_id, x__xgafv=None)</code>
   <pre>Returns Series metadata for the given series ids.
 
 Args:
-  series_id: string, String that identifies the series (repeated)
+  series_id: string, String that identifies the series (required) (repeated)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -109,29 +109,29 @@
     &quot;series&quot;: [
       {
         &quot;seriesType&quot;: &quot;A String&quot;,
-        &quot;eligibleForSubscription&quot;: True or False,
-        &quot;subscriptionId&quot;: &quot;A String&quot;,
         &quot;seriesId&quot;: &quot;A String&quot;,
         &quot;title&quot;: &quot;A String&quot;,
+        &quot;bannerImageUrl&quot;: &quot;A String&quot;,
+        &quot;subscriptionId&quot;: &quot;A String&quot;,
+        &quot;eligibleForSubscription&quot;: True or False,
         &quot;seriesFormatType&quot;: &quot;A String&quot;,
+        &quot;isComplete&quot;: True or False,
         &quot;seriesSubscriptionReleaseInfo&quot;: {
-          &quot;currentReleaseInfo&quot;: {
-            &quot;amountInMicros&quot;: 3.14,
-            &quot;releaseTime&quot;: &quot;A String&quot;,
-            &quot;releaseNumber&quot;: &quot;A String&quot;,
-            &quot;currencyCode&quot;: &quot;A String&quot;,
-          },
           &quot;nextReleaseInfo&quot;: {
-            &quot;releaseTime&quot;: &quot;A String&quot;,
-            &quot;currencyCode&quot;: &quot;A String&quot;,
             &quot;releaseNumber&quot;: &quot;A String&quot;,
             &quot;amountInMicros&quot;: 3.14,
+            &quot;currencyCode&quot;: &quot;A String&quot;,
+            &quot;releaseTime&quot;: &quot;A String&quot;,
           },
           &quot;cancelTime&quot;: &quot;A String&quot;,
           &quot;seriesSubscriptionType&quot;: &quot;A String&quot;,
+          &quot;currentReleaseInfo&quot;: {
+            &quot;currencyCode&quot;: &quot;A String&quot;,
+            &quot;releaseTime&quot;: &quot;A String&quot;,
+            &quot;amountInMicros&quot;: 3.14,
+            &quot;releaseNumber&quot;: &quot;A String&quot;,
+          },
         },
-        &quot;bannerImageUrl&quot;: &quot;A String&quot;,
-        &quot;isComplete&quot;: True or False,
         &quot;imageUrl&quot;: &quot;A String&quot;,
       },
     ],