Warnings removed for ruby trunk

Same as 4d4ff531

Add Rdoc document for Array#forty_two [ci skip]

Updated Rubinius on Travis to 2.1.1

Require time before monkey-patching it

allow to test AR master against AR-JDBC master (with `ENV['AR_JDBC']`)

[ci skip] Add actions to shallow table, change a tense in sentence, add

Fix typo in the CHANGELOG

Same as #12710 but for the time module this time. This time it should
fix the Active Model test suite in isolation avoiding a TypeError to
be raised about the superclass of the DateTime object.

Require bigdecimal before monkey-patching it

If we try to monkey-patch the class before requiring it, then a
"superclass mismatch" (TypeError) error is raised and the build can't
run correctly.

Fixes #12708

show javascripts can be disabled in scaffold generator

Revert "always call set_default_accessors from create_root"

This reverts commit faa1b82b.