docs: docs update (#911)

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Fixes #<issue_number_goes_here> 🦕
diff --git a/docs/dyn/gmail_v1.users.messages.attachments.html b/docs/dyn/gmail_v1.users.messages.attachments.html
index 5b80915..53c8258 100644
--- a/docs/dyn/gmail_v1.users.messages.attachments.html
+++ b/docs/dyn/gmail_v1.users.messages.attachments.html
@@ -75,37 +75,25 @@
 <h1><a href="gmail_v1.html">Gmail API</a> . <a href="gmail_v1.users.html">users</a> . <a href="gmail_v1.users.messages.html">messages</a> . <a href="gmail_v1.users.messages.attachments.html">attachments</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#get">get(userId, messageId, id, x__xgafv=None)</a></code></p>
+  <code><a href="#get">get(userId, messageId, id)</a></code></p>
 <p class="firstline">Gets the specified message attachment.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="get">get(userId, messageId, id, x__xgafv=None)</code>
+    <code class="details" id="get">get(userId, messageId, id)</code>
   <pre>Gets the specified message attachment.
 
 Args:
-  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
-can be used to indicate the authenticated user. (required)
+  userId: string, The user&#x27;s email address. The special value me can be used to indicate the authenticated user. (required)
   messageId: string, The ID of the message containing the attachment. (required)
   id: string, The ID of the attachment. (required)
-  x__xgafv: string, V1 error format.
-    Allowed values
-      1 - v1 error format
-      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # The body of a single MIME message part.
-    "data": "A String", # The body data of a MIME message part as a base64url encoded string.
-        # May be empty for MIME container
-        # types that have no message body or when the body data is sent as a
-        # separate attachment. An attachment ID is present if the body data is
-        # contained in a separate attachment.
-    "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
-        # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
-        # When not present, the entire content of the message part body is
-        # contained in the data field.
-    "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
+    &quot;attachmentId&quot;: &quot;A String&quot;, # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+    &quot;data&quot;: &quot;A String&quot;, # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
+    &quot;size&quot;: 42, # Number of bytes for the message part data (encoding notwithstanding).
   }</pre>
 </div>