Merge pull request #11285 from ankit8898/master

Fixing the broken wikipedia link for Optimistic Concurrency control [ci skip]
Remove deprecated block filter from `ActiveRecord::Migrator#migrate`.
replace artificial space with RDoc markup (follow up #11285). [ci skip]
Remove deprecated nil-passing to `SchemaCache` methods.
build fix: railties tests used deprecated `SchemaCache` methods.
remove useless `env.merge!(env)` from ActionDispatch::IntegrationTest`
remove leftover if after deprecation removal (68563128).
Removed redundant upgrade docs on new cookies.

[ci skip]
Merge pull request #11261 from ryan-endacott/fixguide

Removed redundant upgrade docs on new cookies.
Replaced older rocket sign to new :
Merge pull request #11295 from ankit8898/master

Replaced older rocket sign to new  ":"
SQL Keywords to be in UPPERCASE
Merge pull request #11297 from ankit8898/master

SQL keywords in UPPERCASE
Removed unsued deprecation require
Remove deprecated `ActiveRecord::Base.disable_implicit_join_references=`.
Removed deprecated `Rails.application.railties.engines`.
Merge pull request #11300 from arunagw/railties-engine-deprecation-removed

Removed deprecated `Rails.application.railties.engines`.
Merge pull request #11298 from raysrashmi/removed-deprecation-require

Removed unsued deprecation require
Merge pull request #11299 from arunagw/disable_implicit_join_references_removed

Remove deprecated `ActiveRecord::Base.disable_implicit_join_references=`
Added link to Form Helper article from getting strated [ci skip]