Fix method doc signatures for multiline required parameters (#374)

* Fix method doc signatures for multiline required parameters.

Existing doc generator failed to recognize parameters as required when parameter descriptions
extended over more than one line. Besides presenting incorrect information, resulting
inconsistencies broke checks for automated sample generation.

* Regen docs
diff --git a/docs/dyn/classroom_v1.userProfiles.guardians.html b/docs/dyn/classroom_v1.userProfiles.guardians.html
index d6b335f..f3b6210 100644
--- a/docs/dyn/classroom_v1.userProfiles.guardians.html
+++ b/docs/dyn/classroom_v1.userProfiles.guardians.html
@@ -75,20 +75,20 @@
 <h1><a href="classroom_v1.html">Google Classroom API</a> . <a href="classroom_v1.userProfiles.html">userProfiles</a> . <a href="classroom_v1.userProfiles.guardians.html">guardians</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#delete">delete(studentId=None, guardianId, x__xgafv=None)</a></code></p>
+  <code><a href="#delete">delete(studentId, guardianId, x__xgafv=None)</a></code></p>
 <p class="firstline">Deletes a guardian.</p>
 <p class="toc_element">
-  <code><a href="#get">get(studentId=None, guardianId, x__xgafv=None)</a></code></p>
+  <code><a href="#get">get(studentId, guardianId, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns a specific guardian.</p>
 <p class="toc_element">
-  <code><a href="#list">list(studentId=None, invitedEmailAddress=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(studentId, invitedEmailAddress=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns a list of guardians that the requesting user is permitted to</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="delete">delete(studentId=None, guardianId, x__xgafv=None)</code>
+    <code class="details" id="delete">delete(studentId, guardianId, x__xgafv=None)</code>
   <pre>Deletes a guardian.
 
 The guardian will no longer receive guardian notifications and the guardian
@@ -136,7 +136,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(studentId=None, guardianId, x__xgafv=None)</code>
+    <code class="details" id="get">get(studentId, guardianId, x__xgafv=None)</code>
   <pre>Returns a specific guardian.
 
 This method returns the following error codes:
@@ -210,7 +210,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(studentId=None, invitedEmailAddress=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(studentId, invitedEmailAddress=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Returns a list of guardians that the requesting user is permitted to
 view, restricted to those that match the request.