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/logging_v2.projects.sinks.html b/docs/dyn/logging_v2.projects.sinks.html
index 808ea26..107ce5e 100644
--- a/docs/dyn/logging_v2.projects.sinks.html
+++ b/docs/dyn/logging_v2.projects.sinks.html
@@ -75,26 +75,26 @@
 <h1><a href="logging_v2.html">Stackdriver Logging API</a> . <a href="logging_v2.projects.html">projects</a> . <a href="logging_v2.projects.sinks.html">sinks</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(parent=None, body, uniqueWriterIdentity=None, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent, body, uniqueWriterIdentity=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a sink that exports specified log entries to a destination. The export of newly-ingested log entries begins immediately, unless the current time is outside the sink's start and end times or the sink's writer_identity is not permitted to write to the destination. A sink can export log entries only from the resource owning the sink.</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(sinkName=None, x__xgafv=None)</a></code></p>
+  <code><a href="#delete">delete(sinkName, x__xgafv=None)</a></code></p>
 <p class="firstline">Deletes a sink. If the sink has a unique writer_identity, then that service account is also deleted.</p>
 <p class="toc_element">
-  <code><a href="#get">get(sinkName=None, x__xgafv=None)</a></code></p>
+  <code><a href="#get">get(sinkName, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets a sink.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists sinks.</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>
 <p class="toc_element">
-  <code><a href="#update">update(sinkName=None, body, uniqueWriterIdentity=None, x__xgafv=None)</a></code></p>
+  <code><a href="#update">update(sinkName, body, uniqueWriterIdentity=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates a sink. If the named sink doesn't exist, then this method is identical to sinks.create. If the named sink does exist, then this method replaces the following fields in the existing sink with values from the new sink: destination, filter, output_version_format, start_time, and end_time. The updated filter might also have a new writer_identity; see the unique_writer_identity field.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(parent=None, body, uniqueWriterIdentity=None, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent, body, uniqueWriterIdentity=None, x__xgafv=None)</code>
   <pre>Creates a sink that exports specified log entries to a destination. The export of newly-ingested log entries begins immediately, unless the current time is outside the sink's start and end times or the sink's writer_identity is not permitted to write to the destination. A sink can export log entries only from the resource owning the sink.
 
 Args:
@@ -148,7 +148,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(sinkName=None, x__xgafv=None)</code>
+    <code class="details" id="delete">delete(sinkName, x__xgafv=None)</code>
   <pre>Deletes a sink. If the sink has a unique writer_identity, then that service account is also deleted.
 
 Args:
@@ -175,7 +175,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(sinkName=None, x__xgafv=None)</code>
+    <code class="details" id="get">get(sinkName, x__xgafv=None)</code>
   <pre>Gets a sink.
 
 Args:
@@ -210,7 +210,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Lists sinks.
 
 Args:
@@ -266,7 +266,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(sinkName=None, body, uniqueWriterIdentity=None, x__xgafv=None)</code>
+    <code class="details" id="update">update(sinkName, body, uniqueWriterIdentity=None, x__xgafv=None)</code>
   <pre>Updates a sink. If the named sink doesn't exist, then this method is identical to sinks.create. If the named sink does exist, then this method replaces the following fields in the existing sink with values from the new sink: destination, filter, output_version_format, start_time, and end_time. The updated filter might also have a new writer_identity; see the unique_writer_identity field.
 
 Args: