Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+<h1><a href="cloudtasks_v2beta3.html">Cloud Tasks API</a> . <a href="cloudtasks_v2beta3.projects.html">projects</a> . <a href="cloudtasks_v2beta3.projects.locations.html">locations</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="cloudtasks_v2beta3.projects.locations.queues.html">queues()</a></code>
+</p>
+<p class="firstline">Returns the queues Resource.</p>
+
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets information about a location.</p>
+<p class="toc_element">
+  <code><a href="#list">list(name, pageToken=None, x__xgafv=None, pageSize=None, filter=None)</a></code></p>
+<p class="firstline">Lists information about the supported locations for this service.</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>Gets information about a location.
+
+Args:
+  name: string, Resource name for the location. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A resource that represents Google Cloud Platform location.
+    "displayName": "A String", # The friendly name for this location, typically a nearby city name.
+        # For example, "Tokyo".
+    "labels": { # Cross-service attributes for the location. For example
+        #
+        #     {"cloud.googleapis.com/region": "us-east1"}
+      "a_key": "A String",
+    },
+    "locationId": "A String", # The canonical id for this location. For example: `"us-east1"`.
+    "name": "A String", # Resource name for the location, which may vary between implementations.
+        # For example: `"projects/example-project/locations/us-east1"`
+    "metadata": { # Service-specific metadata. For example the available capacity at the given
+        # location.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(name, pageToken=None, x__xgafv=None, pageSize=None, filter=None)</code>
+  <pre>Lists information about the supported locations for this service.
+
+Args:
+  name: string, The resource that owns the locations collection, if applicable. (required)
+  pageToken: string, The standard list page token.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, The standard list page size.
+  filter: string, The standard list filter.
+
+Returns:
+  An object of the form:
+
+    { # The response message for Locations.ListLocations.
+    "nextPageToken": "A String", # The standard List next-page token.
+    "locations": [ # A list of locations that matches the specified filter in the request.
+      { # A resource that represents Google Cloud Platform location.
+        "displayName": "A String", # The friendly name for this location, typically a nearby city name.
+            # For example, "Tokyo".
+        "labels": { # Cross-service attributes for the location. For example
+            #
+            #     {"cloud.googleapis.com/region": "us-east1"}
+          "a_key": "A String",
+        },
+        "locationId": "A String", # The canonical id for this location. For example: `"us-east1"`.
+        "name": "A String", # Resource name for the location, which may vary between implementations.
+            # For example: `"projects/example-project/locations/us-east1"`
+        "metadata": { # Service-specific metadata. For example the available capacity at the given
+            # location.
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      },
+    ],
+  }</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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