Removes redundant into text

Looks like a remnant sentence fragment from the 3.2 guide.
[ci skip] Fix a typo in Engines.md.
Merge pull request #12310 from JuanitoFatas/fix-a-typo

[ci skip] Fix a typo in Engines.md.
Merge pull request #12307 from douglascalhoun/patch-1

Removes (redundant?) sentence fragment in intro text
Fix typo. This test isn't executed in even postgresql.
Add back options argument in the ActiveRecord::Base.initialize method

This will make easier to hook protected_attributes gem in our code
without making that gem fragile to change in Rails code base.

Closes #12243
Merge pull request #12311 from kennyj/fix_typo_about_uuid

Fix typo. This test isn't executed even in the postgresql.