Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+  font-family: Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
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+.details {
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+</style>
+
+<h1><a href="cloudiot_v1.html">Cloud IoT API</a> . <a href="cloudiot_v1.projects.html">projects</a> . <a href="cloudiot_v1.projects.locations.html">locations</a> . <a href="cloudiot_v1.projects.locations.registries.html">registries</a> . <a href="cloudiot_v1.projects.locations.registries.devices.html">devices</a> . <a href="cloudiot_v1.projects.locations.registries.devices.states.html">states</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#list">list(name, numStates=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists the last few versions of the device state in descending order (i.e.:</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="list">list(name, numStates=None, x__xgafv=None)</code>
+  <pre>Lists the last few versions of the device state in descending order (i.e.:
+newest first).
+
+Args:
+  name: string, The name of the device. For example,
+`projects/p0/locations/us-central1/registries/registry0/devices/device0` or
+`projects/p0/locations/us-central1/registries/registry0/devices/{num_id}`. (required)
+  numStates: integer, The number of states to list. States are listed in descending order of
+update time. The maximum number of states retained is 10. If this
+value is zero, it will return all the states available.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response for `ListDeviceStates`.
+    "deviceStates": [ # The last few device states. States are listed in descending order of server
+        # update time, starting from the most recent one.
+      { # The device state, as reported by the device.
+        "updateTime": "A String", # [Output only] The time at which this state version was updated in Cloud
+            # IoT Core.
+        "binaryData": "A String", # The device state data.
+      },
+    ],
+  }</pre>
+</div>
+
+</body></html>
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