Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="factchecktools_v1alpha1.html">Fact Check Tools API</a> . <a href="factchecktools_v1alpha1.claims.html">claims</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#search">search(maxAgeDays=None, languageCode=None, pageSize=None, query=None, x__xgafv=None, pageToken=None, reviewPublisherSiteFilter=None, offset=None)</a></code></p>
+<p class="firstline">Search through fact-checked claims.</p>
+<p class="toc_element">
+  <code><a href="#search_next">search_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="search">search(maxAgeDays=None, languageCode=None, pageSize=None, query=None, x__xgafv=None, pageToken=None, reviewPublisherSiteFilter=None, offset=None)</code>
+  <pre>Search through fact-checked claims.
+
+Args:
+  maxAgeDays: integer, The maximum age of the returned search results, in days.
+Age is determined by either claim date or review date, whichever is newer.
+  languageCode: string, The BCP-47 language code, such as "en-US" or "sr-Latn". Can be used to
+restrict results by language, though we do not currently consider the
+region.
+  pageSize: integer, The pagination size. We will return up to that many results. Defaults to
+10 if not set.
+  query: string, Textual query string. Required unless `review_publisher_site_filter` is
+specified.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageToken: string, The pagination token. You may provide the `next_page_token` returned from a
+previous List request, if any, in order to get the next page. All other
+fields must have the same values as in the previous request.
+  reviewPublisherSiteFilter: string, The review publisher site to filter results by, e.g. nytimes.com.
+  offset: integer, An integer that specifies the current offset (that is, starting result
+location) in search results. This field is only considered if `page_token`
+is unset. For example, 0 means to return results starting from the first
+matching result, and 10 means to return from the 11th result.
+
+Returns:
+  An object of the form:
+
+    { # Response from searching fact-checked claims.
+    "nextPageToken": "A String", # The next pagination token in the Search response. It should be used as the
+        # `page_token` for the following request. An empty value means no more
+        # results.
+    "claims": [ # The list of claims and all of their associated information.
+      { # Information about the claim.
+        "claimDate": "A String", # The date that the claim was made.
+        "claimReview": [ # One or more reviews of this claim (namely, a fact-checking article).
+          { # Information about a claim review.
+            "languageCode": "A String", # The language this review was written in. For instance, "en" or "de".
+            "publisher": { # Information about the publisher. # The publisher of this claim review.
+              "site": "A String", # Host-level site name, without the protocol or "www" prefix. For instance,
+                  # "awesomefactchecks.com". This value of this field is based purely on the
+                  # claim review URL.
+              "name": "A String", # The name of this publisher. For instance, "Awesome Fact Checks".
+            },
+            "url": "A String", # The URL of this claim review.
+            "reviewDate": "A String", # The date the claim was reviewed.
+            "title": "A String", # The title of this claim review, if it can be determined.
+            "textualRating": "A String", # Textual rating. For instance, "Mostly false".
+          },
+        ],
+        "text": "A String", # The claim text. For instance, "Crime has doubled in the last 2 years."
+        "claimant": "A String", # A person or organization stating the claim. For instance, "John Doe".
+      },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="search_next">search_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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