Fix method doc signatures for multiline required parameters (#374)

* Fix method doc signatures for multiline required parameters.

Existing doc generator failed to recognize parameters as required when parameter descriptions
extended over more than one line. Besides presenting incorrect information, resulting
inconsistencies broke checks for automated sample generation.

* Regen docs
diff --git a/docs/dyn/genomics_v1.referencesets.html b/docs/dyn/genomics_v1.referencesets.html
index e069794..3caae53 100644
--- a/docs/dyn/genomics_v1.referencesets.html
+++ b/docs/dyn/genomics_v1.referencesets.html
@@ -158,9 +158,8 @@
         # md5checksum matches exactly.
       "A String",
     ],
-    "pageToken": "A String", # The continuation token, which is used to page through large result sets.
-        # To get the next page of results, set this parameter to the value of
-        # `nextPageToken` from the previous response.
+    "assemblyId": "A String", # If present, return reference sets for which a substring of their
+        # `assemblyId` matches this string (case insensitive).
     "accessions": [ # If present, return reference sets for which a prefix of any of
         # sourceAccessions
         # match any of these strings. Accession numbers typically have a main number
@@ -169,8 +168,9 @@
     ],
     "pageSize": 42, # The maximum number of results to return in a single page. If unspecified,
         # defaults to 1024. The maximum value is 4096.
-    "assemblyId": "A String", # If present, return reference sets for which a substring of their
-        # `assemblyId` matches this string (case insensitive).
+    "pageToken": "A String", # The continuation token, which is used to page through large result sets.
+        # To get the next page of results, set this parameter to the value of
+        # `nextPageToken` from the previous response.
   }
 
   x__xgafv: string, V1 error format.