Remove redundant `string_to_binary` from type-casting
Merge pull request #11820 from vipulnsward/remove_s2b

Remove redundant `string_to_binary` from type-casting
Add author_name field to post_params to the engines docs
Merge pull request #11830 from cr0t/master

Fixed small mistake in the engines docs
Merge branch 'master' of git://github.com/rails/rails