…r belongs_to. Refactoring it to a simpler form and fixing the build
… [ci skip]
This reverts commit f28f1d7. Reason: This is already covered in this guide elsewhere.
…hods for reading/writing attributes" This reverts commit a49fe6e. Reason: The existing doc about using self[:attribute] is clear enough.
This reverts commit 0a35acb. Reason: Let's cross the bridge when we reach there.
…t images [ci skip]
This reverts commit c46374a. Reason: Changed engines guide not to use a css tag. <plain> will do just fine.