Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/deploymentmanager_alpha.operations.html b/docs/dyn/deploymentmanager_alpha.operations.html
index a271f3c..0c1535c 100644
--- a/docs/dyn/deploymentmanager_alpha.operations.html
+++ b/docs/dyn/deploymentmanager_alpha.operations.html
@@ -95,12 +95,12 @@
 Returns:
   An object of the form:
 
-    { # An Operation resource, used to manage asynchronous API requests.
+    { # An Operation resource, used to manage asynchronous API requests. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
     "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
-    "clientOperationId": "A String", # [Output Only] Reserved for future use.
+    "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
     "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
-    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
+    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
     "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
     "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
     "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
@@ -126,7 +126,7 @@
     "startTime": "A String", # [Output Only] The time that this operation was started by the server. This value is in RFC3339 text format.
     "kind": "deploymentmanager#operation", # [Output Only] Type of the resource. Always compute#operation for Operation resources.
     "name": "A String", # [Output Only] Name of the resource.
-    "region": "A String", # [Output Only] The URL of the region where the operation resides. Only available when performing regional operations.
+    "region": "A String", # [Output Only] The URL of the region where the operation resides. Only available when performing regional operations. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
     "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
         {
@@ -155,28 +155,26 @@
 Currently, only sorting by name or creationTimestamp desc is supported.
   maxResults: integer, The maximum number of results per page that should be returned. If the number of available results is larger than maxResults, Compute Engine returns a nextPageToken that can be used to get the next page of results in subsequent list requests. Acceptable values are 0 to 500, inclusive. (Default: 500)
   pageToken: string, Specifies a page token to use. Set pageToken to the nextPageToken returned by a previous list request to get the next page of results.
-  filter: string, Sets a filter expression for filtering listed resources, in the form filter={expression}. Your {expression} must be in the format: field_name comparison_string literal_string.
+  filter: string, A filter expression that filters resources listed in the response. The expression must specify the field name, a comparison operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The comparison operator must be either =, !=, >, or <.
 
-The field_name is the name of the field you want to compare. Only atomic field types are supported (string, number, boolean). The comparison_string must be either eq (equals) or ne (not equals). The literal_string is the string value to filter to. The literal value must be valid for the type of field you are filtering by (string, number, boolean). For string fields, the literal value is interpreted as a regular expression using RE2 syntax. The literal value must match the entire field.
+For example, if you are filtering Compute Engine instances, you can exclude instances named example-instance by specifying name != example-instance.
 
-For example, to filter for instances that do not have a name of example-instance, you would use filter=name ne example-instance.
+You can also filter nested fields. For example, you could specify scheduling.automaticRestart = false to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels.
 
-You can filter on nested fields. For example, you could filter on instances that have set the scheduling.automaticRestart field to true. Use filtering on nested fields to take advantage of labels to organize and search for results based on label values.
-
-To filter on multiple expressions, provide each separate expression within parentheses. For example, (scheduling.automaticRestart eq true) (zone eq us-central1-f). Multiple expressions are treated as AND expressions, meaning that resources must match all expressions to pass the filters.
+To filter on multiple expressions, provide each separate expression within parentheses. For example, (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake"). By default, each expression is an AND expression. However, you can include AND and OR expressions explicitly. For example, (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true).
 
 Returns:
   An object of the form:
 
     { # A response containing a partial list of operations and a page token used to build the next request if the request has been truncated.
-    "nextPageToken": "A String", # [Output Only] A token used to continue a truncated list request.
-    "operations": [ # [Output Only] Operations contained in this list response.
-      { # An Operation resource, used to manage asynchronous API requests.
+    "nextPageToken": "A String", # Output only. A token used to continue a truncated list request.
+    "operations": [ # Output only. Operations contained in this list response.
+      { # An Operation resource, used to manage asynchronous API requests. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
         "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
-        "clientOperationId": "A String", # [Output Only] Reserved for future use.
+        "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
         "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
         "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
-        "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
+        "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
         "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
         "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
         "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
@@ -202,7 +200,7 @@
         "startTime": "A String", # [Output Only] The time that this operation was started by the server. This value is in RFC3339 text format.
         "kind": "deploymentmanager#operation", # [Output Only] Type of the resource. Always compute#operation for Operation resources.
         "name": "A String", # [Output Only] Name of the resource.
-        "region": "A String", # [Output Only] The URL of the region where the operation resides. Only available when performing regional operations.
+        "region": "A String", # [Output Only] The URL of the region where the operation resides. Only available when performing regional operations. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
         "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
           "errors": [ # [Output Only] The array of errors encountered while processing this operation.
             {