Rubocop and comment fixes

config/gitlab.yml.example

@@ -454,8 +454,10 @@ production: &base
     # introduced in 9.0). Eventually Gitaly use will become mandatory and
     # this option will disappear.
     enabled: true
-    # Default Gitaly authentication token. Can be overriden per storage.
-    token: ""
+    # Default Gitaly authentication token. Can be overriden per storage. Can
+    # be left blank when Gitaly is running locally on a Unix socket, which
+    # is the normal way to deploy Gitaly.
+    token:
   #
   # 4. Advanced settings

lib/gitlab/gitaly_client.rb

@@ -50,8 +50,8 @@ module Gitlab
       address
     end
-    # All RPC calls should use GitalyClient.call. This method makes sure
-    # that per-request authentication headers are set.
+    # All Gitaly RPC call sites should use GitalyClient.call. This method
+    # makes sure that per-request authentication headers are set.
     def self.call(storage, service, rpc, request)
       metadata = request_metadata(storage)
       metadata = yield(metadata) if block_given?

lib/gitlab/workhorse.rb

@@ -28,7 +28,7 @@ module Gitlab
         if Gitlab.config.gitaly.enabled
           server = {
             address: Gitlab::GitalyClient.address(project.repository_storage),
-            token: Gitlab::GitalyClient.token(project.repository_storage),
+            token: Gitlab::GitalyClient.token(project.repository_storage)
           }
           params[:Repository] = repository.gitaly_repository.to_h