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/youtube_v3.liveStreams.html b/docs/dyn/youtube_v3.liveStreams.html
index 65620a3..4f30082 100644
--- a/docs/dyn/youtube_v3.liveStreams.html
+++ b/docs/dyn/youtube_v3.liveStreams.html
@@ -78,7 +78,7 @@
   <code><a href="#delete">delete(id, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</a></code></p>
 <p class="firstline">Deletes a video stream.</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(part=None, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</a></code></p>
+  <code><a href="#insert">insert(part, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</a></code></p>
 <p class="firstline">Creates a video stream. The stream enables you to send your video to YouTube, which can then broadcast the video to your audience.</p>
 <p class="toc_element">
   <code><a href="#list">list(part, onBehalfOfContentOwner=None, pageToken=None, onBehalfOfContentOwnerChannel=None, maxResults=None, mine=None, id=None)</a></code></p>
@@ -87,7 +87,7 @@
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#update">update(part=None, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</a></code></p>
+  <code><a href="#update">update(part, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</a></code></p>
 <p class="firstline">Updates a video stream. If the properties that you want to change cannot be updated, then you need to create a new stream with the proper settings.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -108,7 +108,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(part=None, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</code>
+    <code class="details" id="insert">insert(part, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</code>
   <pre>Creates a video stream. The stream enables you to send your video to YouTube, which can then broadcast the video to your audience.
 
 Args:
@@ -341,7 +341,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(part=None, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</code>
+    <code class="details" id="update">update(part, body, onBehalfOfContentOwner=None, onBehalfOfContentOwnerChannel=None)</code>
   <pre>Updates a video stream. If the properties that you want to change cannot be updated, then you need to create a new stream with the proper settings.
 
 Args: