Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/logging_v2.projects.logs.html b/docs/dyn/logging_v2.projects.logs.html
index 9a7a76b..7d4ff2f 100644
--- a/docs/dyn/logging_v2.projects.logs.html
+++ b/docs/dyn/logging_v2.projects.logs.html
@@ -76,22 +76,24 @@
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#delete">delete(logName, x__xgafv=None)</a></code></p>
-<p class="firstline">Deletes all the log entries in a log. The log reappears if it receives new entries.</p>
+<p class="firstline">Deletes all the log entries in a log. The log reappears if it receives new entries. Log entries written shortly before the delete operation might not be deleted.</p>
 <p class="toc_element">
   <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
-<p class="firstline">Lists the logs in projects or organizations. Only logs that have entries are listed.</p>
+<p class="firstline">Lists the logs in projects, organizations, folders, or billing accounts. Only logs that have entries are listed.</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="delete">delete(logName, x__xgafv=None)</code>
-  <pre>Deletes all the log entries in a log. The log reappears if it receives new entries.
+  <pre>Deletes all the log entries in a log. The log reappears if it receives new entries. Log entries written shortly before the delete operation might not be deleted.
 
 Args:
   logName: string, Required. The resource name of the log to delete:
 "projects/[PROJECT_ID]/logs/[LOG_ID]"
 "organizations/[ORGANIZATION_ID]/logs/[LOG_ID]"
+"billingAccounts/[BILLING_ACCOUNT_ID]/logs/[LOG_ID]"
+"folders/[FOLDER_ID]/logs/[LOG_ID]"
 [LOG_ID] must be URL-encoded. For example, "projects/my-project-id/logs/syslog", "organizations/1234567890/logs/cloudresourcemanager.googleapis.com%2Factivity". For more information about log names, see LogEntry. (required)
   x__xgafv: string, V1 error format.
     Allowed values
@@ -111,12 +113,14 @@
 
 <div class="method">
     <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</code>
-  <pre>Lists the logs in projects or organizations. Only logs that have entries are listed.
+  <pre>Lists the logs in projects, organizations, folders, or billing accounts. Only logs that have entries are listed.
 
 Args:
   parent: string, Required. The resource name that owns the logs:
 "projects/[PROJECT_ID]"
 "organizations/[ORGANIZATION_ID]"
+"billingAccounts/[BILLING_ACCOUNT_ID]"
+"folders/[FOLDER_ID]"
  (required)
   pageToken: string, Optional. If present, then retrieve the next batch of results from the preceding call to this method. pageToken must be the value of nextPageToken from the previous response. The values of other method parameters should be identical to those in the previous call.
   x__xgafv: string, V1 error format.