Fix a bug with initialize schema_migrations table

This line causes an error when executing the command: `rails db:drop db:create db:schema:load`

ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR:  syntax error at or near "{"
LINE 1: ...NSERT INTO "schema_migrations" (version) VALUES (#{v}), (#{v...

Introduce new welcome page for new projects

Consistently warn that passing an offset to `find_nth` is deprecated

[ci-skip]

@bogdan pointed out that a `loaded?` relation would not warn that the supplied
offset would be removed. This fixes that oversight.

https://github.com/rails/rails/commit/16a476e4f8f802774ae7c8dca2e59f4e672dc591#commitcomment-15706834

Although this second argument is probably not widely used, and would be
ignored anyway in the loaded? case, this could protect callers from gotchas.

[Ben Woosley & Victor Kmita]

English explanation to multi-level nested join

Raise AR::IrreversibleOrderError when #reverse_order can not do it's job

Added an "Or, in English..." explanation to the "Joining Nested Associations (Multiple Level)" example.

Update sucker_punch adapter's description

Remove nonsense definition of == from `AcceptItem`.  The definition only
compared names and not `q` values or even object identity.  The only use
was in the `assort!` method that really just wanted the index of the
item given the item's name.  Instead we just change the caller to use
`index` with the block form.

This commit refactors the private methods that were just aliases to []
to just directly use [] and cache the return values on the stack.

same strategy as `@text_xml_idx`: cache it on the stack to avoid ivar
lookups and the `||=` call.

this eliminates the ivar lookup and also eliminates the `||=`
conditional that happens every time we called the `text_xml_idx` method.

[ci skip]

Update ActiveJob adapter for sucker_punch 2.0

Fix img alt attribute generation when using Sprockets >= 3.0

Fix typo in strong params hash deprecation message

and remove unecessary spaces in string interpolation.

The commit which originally added this behavior did not consider that
doing `Subclass.new` does not actually populate the `type` field in the
attributes (though perhaps it should). We simply need to not use the
defaults for STI related things unless we are instantiating the base
class.

Fixes #23285.

This PR includes two changes for 2.0.0:

- Breaking API change around `async.perform` --> `perform_async`
- New addition of `perform_in`, which now allows end users of the
  adapter to use the `enqueued_at` public API method.

Fix small typos in asset_pipeline.md

Improvement in ActiveRecord::Persistence doc [ci skip]

Fix doc

Revert "Eliminate the EventMachine dependency"

remove duplication section [ci skip]

Raises when #reverse_order can not process SQL order instead of making
invalid SQL before this patch

[ci skip]

We found that inserting all 600 schema_migrations for our mid-sized app takes about a minute on a cloud based CI environment.

I assume that the original code did not use multi-row-insert because SQLite3 was not supporting the syntax back then,
but it's been supported since 3.7.11: http://www.sqlite.org/releaselog/3_7_11.html

Fix undefined error for `ActionController::Parameters`

These tests were failing due to backwards incompatible changes, as apart
of the v1.0.3 release of rails-html-sanitizer.