Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="alertcenter_v1beta1.html">G Suite Alert Center API</a> . <a href="alertcenter_v1beta1.alerts.html">alerts</a> . <a href="alertcenter_v1beta1.alerts.feedback.html">feedback</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#create">create(alertId, body, customerId=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates new feedback for an alert. Attempting to create a feedback for</p>
+<p class="toc_element">
+  <code><a href="#list">list(alertId, customerId=None, x__xgafv=None, filter=None)</a></code></p>
+<p class="firstline">Lists all the feedback for an alert. Attempting to list feedbacks for</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="create">create(alertId, body, customerId=None, x__xgafv=None)</code>
+  <pre>Creates new feedback for an alert. Attempting to create a feedback for
+a non-existent alert returns `NOT_FOUND` error.
+
+Args:
+  alertId: string, Required. The identifier of the alert this feedback belongs to. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # A customer feedback about an alert.
+    "feedbackId": "A String", # Output only. The unique identifier for the feedback.
+    "alertId": "A String", # Output only. The alert identifier.
+    "createTime": "A String", # Output only. The time this feedback was created.
+    "customerId": "A String", # Output only. The unique identifier of the Google account of the customer.
+    "type": "A String", # Required. The type of the feedback.
+    "email": "A String", # Output only. The email of the user that provided the feedback.
+  }
+
+  customerId: string, Optional. The unique identifier of the G Suite organization account of the
+customer the alert is associated with.
+Inferred from the caller identity if not provided.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A customer feedback about an alert.
+      "feedbackId": "A String", # Output only. The unique identifier for the feedback.
+      "alertId": "A String", # Output only. The alert identifier.
+      "createTime": "A String", # Output only. The time this feedback was created.
+      "customerId": "A String", # Output only. The unique identifier of the Google account of the customer.
+      "type": "A String", # Required. The type of the feedback.
+      "email": "A String", # Output only. The email of the user that provided the feedback.
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(alertId, customerId=None, x__xgafv=None, filter=None)</code>
+  <pre>Lists all the feedback for an alert. Attempting to list feedbacks for
+a non-existent alert returns `NOT_FOUND` error.
+
+Args:
+  alertId: string, Required. The alert identifier.
+The "-" wildcard could be used to represent all alerts. (required)
+  customerId: string, Optional. The unique identifier of the G Suite organization account of the
+customer the alert feedback are associated with.
+Inferred from the caller identity if not provided.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  filter: string, Optional. A query string for filtering alert feedback results.
+For more details, see [Query
+filters](/admin-sdk/alertcenter/guides/query-filters) and [Supported
+query filter
+fields](/admin-sdk/alertcenter/reference/filter-fields#alerts.feedback.list).
+
+Returns:
+  An object of the form:
+
+    { # Response message for an alert feedback listing request.
+    "feedback": [ # The list of alert feedback.
+        # Feedback entries for each alert are ordered by creation time descending.
+      { # A customer feedback about an alert.
+          "feedbackId": "A String", # Output only. The unique identifier for the feedback.
+          "alertId": "A String", # Output only. The alert identifier.
+          "createTime": "A String", # Output only. The time this feedback was created.
+          "customerId": "A String", # Output only. The unique identifier of the Google account of the customer.
+          "type": "A String", # Required. The type of the feedback.
+          "email": "A String", # Output only. The email of the user that provided the feedback.
+        },
+    ],
+  }</pre>
+</div>
+
+</body></html>
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