Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/spanner_v1.projects.instanceConfigs.html b/docs/dyn/spanner_v1.projects.instanceConfigs.html
index 9d8410f..ad2cd1c 100644
--- a/docs/dyn/spanner_v1.projects.instanceConfigs.html
+++ b/docs/dyn/spanner_v1.projects.instanceConfigs.html
@@ -105,6 +105,17 @@
     "name": "A String", # A unique identifier for the instance configuration.  Values
         # are of the form
         # `projects/<project>/instanceConfigs/a-z*`
+    "replicas": [ # The geographic placement of nodes in this instance configuration and their
+        # replication properties.
+      {
+        "defaultLeaderLocation": True or False, # If true, this location is designated as the default leader location where
+            # leader replicas are placed. See the [region types
+            # documentation](https://cloud.google.com/spanner/docs/instances#region_types)
+            # for more details.
+        "type": "A String", # The type of replica.
+        "location": "A String", # The location of the serving resources, e.g. "us-central1".
+      },
+    ],
   }</pre>
 </div>
 
@@ -140,6 +151,17 @@
         "name": "A String", # A unique identifier for the instance configuration.  Values
             # are of the form
             # `projects/<project>/instanceConfigs/a-z*`
+        "replicas": [ # The geographic placement of nodes in this instance configuration and their
+            # replication properties.
+          {
+            "defaultLeaderLocation": True or False, # If true, this location is designated as the default leader location where
+                # leader replicas are placed. See the [region types
+                # documentation](https://cloud.google.com/spanner/docs/instances#region_types)
+                # for more details.
+            "type": "A String", # The type of replica.
+            "location": "A String", # The location of the serving resources, e.g. "us-central1".
+          },
+        ],
       },
     ],
   }</pre>