Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="ml_v1.html">Cloud Machine Learning Engine</a> . <a href="ml_v1.projects.html">projects</a> . <a href="ml_v1.projects.locations.html">locations</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Get the complete list of CMLE capabilities in a location, along with their</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
+<p class="firstline">List all locations that provides at least one type of CMLE capability.</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>Get the complete list of CMLE capabilities in a location, along with their
+location-specific properties.
+
+Args:
+  name: string, Required. The name of 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:
+
+    {
+    "name": "A String",
+    "capabilities": [ # Capabilities available in the location.
+      {
+        "type": "A String",
+        "availableAccelerators": [ # Available accelerators for the capability.
+          "A String",
+        ],
+      },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</code>
+  <pre>List all locations that provides at least one type of CMLE capability.
+
+Args:
+  parent: string, Required. The name of the project for which available locations are to be
+listed (since some locations might be whitelisted for specific projects). (required)
+  pageToken: string, Optional. A page token to request the next page of results.
+
+You get the token from the `next_page_token` field of the response from
+the previous call.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, Optional. The number of locations to retrieve per "page" of results. If
+there are more remaining results than this number, the response message
+will contain a valid value in the `next_page_token` field.
+
+The default value is 20, and the maximum page size is 100.
+
+Returns:
+  An object of the form:
+
+    {
+    "nextPageToken": "A String", # Optional. Pass this token as the `page_token` field of the request for a
+        # subsequent call.
+    "locations": [ # Locations where at least one type of CMLE capability is available.
+      {
+        "name": "A String",
+        "capabilities": [ # Capabilities available in the location.
+          {
+            "type": "A String",
+            "availableAccelerators": [ # Available accelerators for the capability.
+              "A String",
+            ],
+          },
+        ],
+      },
+    ],
+  }</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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