chore: regens API reference docs (#889)

diff --git a/docs/dyn/content_v2.accountstatuses.html b/docs/dyn/content_v2.accountstatuses.html
index 83c2020..a2642b8 100644
--- a/docs/dyn/content_v2.accountstatuses.html
+++ b/docs/dyn/content_v2.accountstatuses.html
@@ -75,7 +75,7 @@
 <h1><a href="content_v2.html">Content API for Shopping</a> . <a href="content_v2.accountstatuses.html">accountstatuses</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#custombatch">custombatch(body)</a></code></p>
+  <code><a href="#custombatch">custombatch(body=None)</a></code></p>
 <p class="firstline">Retrieves multiple Merchant Center account statuses in a single request.</p>
 <p class="toc_element">
   <code><a href="#get">get(merchantId, accountId, destinations=None)</a></code></p>
@@ -88,18 +88,21 @@
 <p class="firstline">Retrieves the next page of results.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="custombatch">custombatch(body)</code>
+    <code class="details" id="custombatch">custombatch(body=None)</code>
   <pre>Retrieves multiple Merchant Center account statuses in a single request.
 
 Args:
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
     "entries": [ # The request entries to be processed in the batch.
       { # A batch entry encoding a single non-batch accountstatuses request.
         "batchId": 42, # An entry ID, unique within the batch request.
-        "method": "A String", # The method (get).
+        "method": "A String", # The method of the batch entry.
+            #
+            # Acceptable values are:
+            # - "`get`"
         "destinations": [ # If set, only issues for the specified destinations are returned, otherwise only issues for the Shopping destination.
           "A String",
         ],
@@ -119,8 +122,8 @@
       { # A batch entry encoding a single non-batch accountstatuses response.
         "batchId": 42, # The ID of the request entry this entry responds to.
         "errors": { # A list of errors returned by a failed batch entry. # A list of errors defined if and only if the request failed.
-          "message": "A String", # The message of the first error in errors.
-          "code": 42, # The HTTP status of the first error in errors.
+          "message": "A String", # The message of the first error in `errors`.
+          "code": 42, # The HTTP status of the first error in `errors`.
           "errors": [ # A list of errors.
             { # An error returned by the API.
               "reason": "A String", # The error code.
@@ -130,12 +133,17 @@
           ],
         },
         "accountStatus": { # The status of an account, i.e., information about its products, which is computed offline and not returned immediately at insertion time. # The requested account status. Defined if and only if the request was successful.
-          "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "content#accountStatus".
+          "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "`content#accountStatus`"
           "websiteClaimed": True or False, # Whether the account's website is claimed or not.
           "accountLevelIssues": [ # A list of account level issues.
             {
               "documentation": "A String", # The URL of a web page to help resolving this issue.
               "severity": "A String", # Severity of the issue.
+                  #
+                  # Acceptable values are:
+                  # - "`critical`"
+                  # - "`error`"
+                  # - "`suggestion`"
               "title": "A String", # Short description of the issue.
               "country": "A String", # Country for which this issue is reported.
               "destination": "A String", # The destination the issue applies to.
@@ -160,6 +168,10 @@
               ],
               "destination": "A String", # The destination the data applies to.
               "channel": "A String", # The channel the data applies to.
+                  #
+                  # Acceptable values are:
+                  # - "`local`"
+                  # - "`online`"
               "statistics": { # Aggregated product statistics.
                 "active": "A String", # Number of active offers.
                 "expiring": "A String", # Number of expiring offers.
@@ -171,7 +183,10 @@
           "dataQualityIssues": [ # DEPRECATED - never populated.
             {
               "displayedValue": "A String",
-              "severity": "A String",
+              "severity": "A String", # Acceptable values are:
+                  # - "`critical`"
+                  # - "`error`"
+                  # - "`suggestion`"
               "lastChecked": "A String",
               "country": "A String",
               "destination": "A String",
@@ -203,7 +218,7 @@
   <pre>Retrieves the status of a Merchant Center account. No itemLevelIssues are returned for multi-client accounts.
 
 Args:
-  merchantId: string, The ID of the managing account. If this parameter is not the same as accountId, then this account must be a multi-client account and accountId must be the ID of a sub-account of this account. (required)
+  merchantId: string, The ID of the managing account. If this parameter is not the same as accountId, then this account must be a multi-client account and `accountId` must be the ID of a sub-account of this account. (required)
   accountId: string, The ID of the account. (required)
   destinations: string, If set, only issues for the specified destinations are returned, otherwise only issues for the Shopping destination. (repeated)
 
@@ -211,12 +226,17 @@
   An object of the form:
 
     { # The status of an account, i.e., information about its products, which is computed offline and not returned immediately at insertion time.
-    "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "content#accountStatus".
+    "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "`content#accountStatus`"
     "websiteClaimed": True or False, # Whether the account's website is claimed or not.
     "accountLevelIssues": [ # A list of account level issues.
       {
         "documentation": "A String", # The URL of a web page to help resolving this issue.
         "severity": "A String", # Severity of the issue.
+            #
+            # Acceptable values are:
+            # - "`critical`"
+            # - "`error`"
+            # - "`suggestion`"
         "title": "A String", # Short description of the issue.
         "country": "A String", # Country for which this issue is reported.
         "destination": "A String", # The destination the issue applies to.
@@ -241,6 +261,10 @@
         ],
         "destination": "A String", # The destination the data applies to.
         "channel": "A String", # The channel the data applies to.
+            #
+            # Acceptable values are:
+            # - "`local`"
+            # - "`online`"
         "statistics": { # Aggregated product statistics.
           "active": "A String", # Number of active offers.
           "expiring": "A String", # Number of expiring offers.
@@ -252,7 +276,10 @@
     "dataQualityIssues": [ # DEPRECATED - never populated.
       {
         "displayedValue": "A String",
-        "severity": "A String",
+        "severity": "A String", # Acceptable values are:
+            # - "`critical`"
+            # - "`error`"
+            # - "`suggestion`"
         "lastChecked": "A String",
         "country": "A String",
         "destination": "A String",
@@ -294,12 +321,17 @@
     "kind": "content#accountstatusesListResponse", # Identifies what kind of resource this is. Value: the fixed string "content#accountstatusesListResponse".
     "resources": [
       { # The status of an account, i.e., information about its products, which is computed offline and not returned immediately at insertion time.
-        "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "content#accountStatus".
+        "kind": "content#accountStatus", # Identifies what kind of resource this is. Value: the fixed string "`content#accountStatus`"
         "websiteClaimed": True or False, # Whether the account's website is claimed or not.
         "accountLevelIssues": [ # A list of account level issues.
           {
             "documentation": "A String", # The URL of a web page to help resolving this issue.
             "severity": "A String", # Severity of the issue.
+                #
+                # Acceptable values are:
+                # - "`critical`"
+                # - "`error`"
+                # - "`suggestion`"
             "title": "A String", # Short description of the issue.
             "country": "A String", # Country for which this issue is reported.
             "destination": "A String", # The destination the issue applies to.
@@ -324,6 +356,10 @@
             ],
             "destination": "A String", # The destination the data applies to.
             "channel": "A String", # The channel the data applies to.
+                #
+                # Acceptable values are:
+                # - "`local`"
+                # - "`online`"
             "statistics": { # Aggregated product statistics.
               "active": "A String", # Number of active offers.
               "expiring": "A String", # Number of expiring offers.
@@ -335,7 +371,10 @@
         "dataQualityIssues": [ # DEPRECATED - never populated.
           {
             "displayedValue": "A String",
-            "severity": "A String",
+            "severity": "A String", # Acceptable values are:
+                # - "`critical`"
+                # - "`error`"
+                # - "`suggestion`"
             "lastChecked": "A String",
             "country": "A String",
             "destination": "A String",