Extract common database defaults; better use of YAML

add autoload :TransactionState to fix Marshal.load issues

Added platform dependent gems

Warning removed for ruby-head

See #12475

If people are on rbx they will get the desired gem

Don't call sub! since it may return nil. Reverts 4d15661d.

Revert "drop one more string allocation"

This reverts commit 4d15661d.

Fixed plugin_generator test

Template replay needs to happen after bundle.

As we are doing TemplateRecording in apply_rails_template.

here are few commits for changes

8beb42cf
9104702b

Standardize all JSON encoded times to use 3 decimal fractional seconds

Extract method refactoring for Rails::Server#start

Fix AS::TimeWithZone#as_json docs [ci skip]

According to 28ab79d7

Move the JSON extension require statements to the right place.

In #12203, the JSON core extensions were moved into the `core_ext`
folder. Unfortunately, there are some corresponding requires that
were left behind. The problem is partially addressed in #12710, this
commit fixes the rest.

Do not expose internal state in the public encoder API (i.e. as_json)

See [1] for why this is not a good idea.

As part of this refactor, circular reference protection in as_json has
been removed and the corresponding error class has been deprecated.

As discussed with @jeremy, circular reference error is considered
programmer errors and protecting against it is out of scope for
the encoder.

This is again based on the excellent work by @sergiocampama in #11728.

[1]: https://github.com/intridea/multi_json/pull/138#issuecomment-24468223

This saved about 46 array allocations per request on an extremely simple
application.  The delegation happened in the notification subsystem
which is a hotspot, so this should result in even more savings with
larger apps.

Squashed commit of the following:

commit 41eef0d1479526f7de25fd4391d98e61c126d9f5
Author: Aaron Patterson <aaron.patterson@gmail.com>
Date:   Wed Nov 6 16:32:31 2013 -0800

    speed up notifications

commit 586b4a18656f66fb2c518fb8e8fee66a016e8ae6
Author: Aaron Patterson <aaron.patterson@gmail.com>
Date:   Wed Nov 6 16:31:05 2013 -0800

    speed up runtime registry methods

commit b67d074cb4314df9a88438f785868cef77e583d7
Author: Aaron Patterson <aaron.patterson@gmail.com>
Date:   Wed Nov 6 16:28:12 2013 -0800

    change method name and make it public

constant.

`view_assigns` can use the precalculated sets and remove instance
variables without allocating any extra arrays

Add +capitalize+ option to Inflector.humanize

So strings can be humanized without being capitalized:

    'employee_salary'.humanize                    # => "Employee salary"
    'employee_salary'.humanize(capitalize: false) # => "employee salary"

rdoc: favicon source shouldn't begin with a slash to reference asset pipeline resource [ci skip]
Conflicts:
	actionview/lib/action_view/helpers/asset_tag_helper.rb