build warning

Author: kay-kim

source/tutorial/change-streams-example.txt

@@ -28,9 +28,8 @@ Change Stream Examples
    :depth: 1
    :class: singlecol
 
-
 .. tabs-drivers::
-   
+
    tabs:
      - id: python
        content: |
@@ -56,15 +55,15 @@ Change Stream Examples
          <http://mongoc.org/libmongoc/current/tutorial.html#making-a-connection/>`_
          that contains an ``inventory`` collection.
 
-         
+
      - id: nodejs
        content: |
          The Node.js examples below assume that you have `connected to a MongoDB replica set and have accessed a database
          <https://mongodb.github.io/node-mongodb-native/api-generated/mongoclient.html#connect>`_
          that contains an ``inventory`` collection.
-      
-      - id: ruby
-        content: |
+
+     - id: ruby
+       content: |
           The examples below assume that you have `connected to a MongoDB replica set and have accessed a database
           <https://docs.mongodb.com/ruby-driver/master/tutorials/ruby-driver-create-client/>`_
           that contains an ``inventory`` collection.