Manipulating Scaffolded Files
Depending on the version of Entity Framework installed your DBContext file may contain the comment:
"#warning To protect potentially sensitive information in your connection string, you should move it out of source code. See http://go.microsoft.com/fwlink/?LinkId=723263 for guidance on storing connection strings."
You may want to remove it before generating your code. The External Folder Node Type provides some flags that will allow you to remove this text.