fix env toggling, improve error page styling
Merge pull request #8713 from goshakkk/better-error-page

Fix env toggling, improve error page styling
remove meaningless use of Relation#all

particularly, `all(options)` would warn
Typo and grammar fixes in the ActionPack CHANGELOG
Merge pull request #8725 from mattdbridges/patch-2

Typo and grammar fixes in the ActionPack CHANGELOG
Rename update_attributes method to update, keep update_attributes as an alias
Change docs to use update instead of update_attributes
Change guides to use update instead of update_attributes
Updating default application templates to use update instead of update_attributes
Add Changelog entry regarding update_attibutes being renamed to update
Merge pull request #8705 from amparo-luna/change_update_attributes_to_update

Rename update_attributes method to update
Remove a useless TODO comment
Merge pull request #8727 from robin850/patch-2

Remove a useless TODO comment
Adding Back Rails::Engine::Railties#engines

Removing it breaks functionality with gems such as Thinking Sphinx.
This restores it with a deprecation warning. Closes #8551
need to to_a the Relation to execute SQL here
`Model.all` alone does nothing
Merge pull request #8728 from amatsuda/model_all_returns_a_relation

A small fix for an AR test case
deliver_ is an old API
Adding a usage message to install.rb script

Previously, invoking the install.rb script with zero arguments
caused it to attempt to install all gems without a version
suffix, which would fail spectacularly. Failing gracefully with
a usage message is more helpful to a first-time user.
Merge pull request #8729 from timraymond/help_message_for_install_script

Adding a usage message to install.rb script