Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="cloudsearch_v1.html">Cloud Search API</a> . <a href="cloudsearch_v1.query.html">query</a> . <a href="cloudsearch_v1.query.sources.html">sources</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#list">list(requestOptions_timeZone=None, pageToken=None, requestOptions_debugOptions_enableDebugging=None, requestOptions_searchApplicationId=None, requestOptions_languageCode=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns list of sources that user can use for Search and Suggest APIs.</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="list">list(requestOptions_timeZone=None, pageToken=None, requestOptions_debugOptions_enableDebugging=None, requestOptions_searchApplicationId=None, requestOptions_languageCode=None, x__xgafv=None)</code>
+  <pre>Returns list of sources that user can use for Search and Suggest APIs.
+
+Args:
+  requestOptions_timeZone: string, Current user's time zone id, such as "America/Los_Angeles" or
+"Australia/Sydney". These IDs are defined by
+[Unicode Common Locale Data Repository (CLDR)](http://cldr.unicode.org/)
+project, and currently available in the file
+[timezone.xml](http://unicode.org/repos/cldr/trunk/common/bcp47/timezone.xml)
+  pageToken: string, Number of sources to return in the response.
+  requestOptions_debugOptions_enableDebugging: boolean, If you are asked by Google to help with debugging, set this field.
+Otherwise, ignore this field.
+  requestOptions_searchApplicationId: string, Id of the application created using SearchApplicationsService.
+  requestOptions_languageCode: string, The BCP-47 language code, such as "en-US" or "sr-Latn".
+For more information, see
+http://www.unicode.org/reports/tr35/#Unicode_locale_identifier.
+For translations.
+
+When specified, the documents in search results are biased towards the
+specified language.
+Suggest API does not use this parameter. It autocompletes only based on
+characters in the query.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # List sources response.
+    "nextPageToken": "A String",
+    "sources": [
+      { # List of sources that the user can search using the query API.
+        "source": { # Defines sources for the suggest/search APIs. # Name of the source
+          "predefinedSource": "A String", # Predefined content source for Google Apps.
+          "name": "A String", # Source name for content indexed by the
+              # Indexing API.
+        },
+        "shortName": "A String", # A short name or alias for the source.  This value can be used with the
+            # 'source' operator.
+        "displayName": "A String", # Display name of the data source.
+        "operators": [ # List of all operators applicable for this source.
+          { # The definition of a operator that can be used in a Search/Suggest request.
+            "enumValues": [ # Potential list of values for the opeatror field. This field is only filled
+                # when we can safely enumerate all the possible values of this operator.
+              "A String",
+            ],
+            "displayName": "A String", # Display name of the operator
+            "greaterThanOperatorName": "A String", # Indicates the operator name that can be used to  isolate the property using
+                # the greater-than operator.
+            "isReturnable": True or False, # Will the property associated with this facet be returned as part of search
+                # results.
+            "lessThanOperatorName": "A String", # Indicates the operator name that can be used to  isolate the property using
+                # the less-than operator.
+            "isRepeatable": True or False, # Indicates if multiple values can be set for this property.
+            "isFacetable": True or False, # Can this operator be used to get facets.
+            "type": "A String", # Type of the operator.
+            "operatorName": "A String", # The name of the operator.
+            "isSortable": True or False, # Can this operator be used to sort results.
+            "isSuggestable": True or False, # Can get suggestions for this field.
+          },
+        ],
+      },
+    ],
+  }</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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