anchor.diff:  
   ### <a id='variable-substitution'></a> Add Variables to a Manifest
   
  -You can use variables to create app manifests with values shared across all applicable environments in combination with references to environment-specific differences defined in separate files. 
  +You can use variables to create app manifests with values shared across all applicable environments in combination with references to environment-specific differences defined in separate files.
   
   In addition, using variables enables you to store sensitive data in a separate file that the app manifest would reference, making the security sensitive data easier to manage and keep secure.
   
   To add variables to an app manifest, do the following:
   
  -1. Create a file called `vars.yml`. 
  +1. Create a file called `vars.yml`.
   
   1. Add attributes to your `vars.yml` file. See the following example:
   
  
positive.code: ### <a id='buildpack-deprecated'></a> Buildpack Field in Manifest Is Deprecated
  
  The singular `buildpack` field in manifests is deprecated. It has been replaced by `buildpacks`, which is now an array which takes as a value [multiple buildpacks](#buildpack).
  
  
negative.code: 
  This topic describes manifest formatting and provides a full list of attributes available for app manifests using the v6 CLI. You can use it alongside the [Deploying with App Manifests](./manifest.html) topic, which provides basic procedures and guidance for deploying apps with manifests.
  
  For manifest properties for the v7 beta cf CLI, see the [CC API documentation](http://v3-apidocs.cloudfoundry.org/version/3.75.0/index.html#app-manifest) for v3 app manifest properties.
  
  
  
  