Just a quick recap on Terraform code style attributes:

• The proper indentation in a Terraform file is two spaces rather than a tab.
• Block meta-arguments should go at the end of a resource definition.
• All single arguments should be together in a group followed by an empty line.
• Use blank lines for clarity and logical separations in the code. It helps to keep it more readable.
• Line up equals signs when appropriate. It makes a huge difference in readability.

The basic principal is to think about readability as you write and refactor your code.