push `run` up to preload
push running the preloaders up
access preloaders independently of model mutations
fix method name
split up construction and mutation
preserve order on the RHS query
Merge pull request #12232 from claudiob/delete-unused-helper-fixtures

Remove unused AV helper fixtures from e10a2531
return a list rather than hash
combine methods so we can reuse preloaders
cache associated target records hash
Removes redundant into text

Looks like a remnant sentence fragment from the 3.2 guide.
[ci skip] Add some comment about downcase url encoded string.
[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.
[ci skip] Add a type modifier in migrations.md.
[ci skip] Add missing migrate step in generating comment resource section.