Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+.method  {
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+
+<h1><a href="chat_v1.html">Hangouts Chat API</a> . <a href="chat_v1.spaces.html">spaces</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="chat_v1.spaces.members.html">members()</a></code>
+</p>
+<p class="firstline">Returns the members Resource.</p>
+
+<p class="toc_element">
+  <code><a href="chat_v1.spaces.messages.html">messages()</a></code>
+</p>
+<p class="firstline">Returns the messages Resource.</p>
+
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns a space.</p>
+<p class="toc_element">
+  <code><a href="#list">list(pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists spaces the caller is a member of.</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="get">get(name, x__xgafv=None)</code>
+  <pre>Returns a space.
+
+Args:
+  name: string, Required. Resource name of the space, in the form "spaces/*".
+
+Example: spaces/AAAAMpdlehY (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A room or DM in Hangouts Chat.
+    "displayName": "A String", # Output only. The display name (only if the space is a room).
+    "type": "A String", # Output only. The type of a space.
+    "name": "A String", # Resource name of the space, in the form "spaces/*".
+        #
+        # Example: spaces/AAAAMpdlehYs
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(pageSize=None, pageToken=None, x__xgafv=None)</code>
+  <pre>Lists spaces the caller is a member of.
+
+Args:
+  pageSize: integer, Requested page size. The value is capped at 1000.
+Server may return fewer results than requested.
+If unspecified, server will default to 100.
+  pageToken: string, A token identifying a page of results the server should return.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    {
+    "nextPageToken": "A String", # Continuation token to retrieve the next page of results. It will be empty
+        # for the last page of results. Tokens expire in an hour. An error is thrown
+        # if an expired token is passed.
+    "spaces": [ # List of spaces in the requested (or first) page.
+      { # A room or DM in Hangouts Chat.
+        "displayName": "A String", # Output only. The display name (only if the space is a room).
+        "type": "A String", # Output only. The type of a space.
+        "name": "A String", # Resource name of the space, in the form "spaces/*".
+            #
+            # Example: spaces/AAAAMpdlehYs
+      },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+</body></html>
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