Use ActionView::OutputBuffer#safe_append= from templates
avoid extra method calls for appending newlines

before:

        ');@output_buffer.append= ( content_icon row[:content] );@output_buffer.safe_concat('
');@output_buffer.safe_concat('        ');@output_buffer.append= ( spinner_img );@output_buffer.safe_concat('
');@output_buffer.safe_concat('      </td>
      <td class="content">
        ');@output_buffer.append= ( content_link row[:content] );@output_buffer.safe_concat('
');@output_buffer.safe_concat('      </td>
      <td class="message">
');

after:

        ';@output_buffer.append=( content_icon row[:content] );@output_buffer.safe_append='
        ';@output_buffer.append=( spinner_img );@output_buffer.safe_append='
      </td>
      <td class="content">
        ';@output_buffer.append=( content_link row[:content] );@output_buffer.safe_append='
      </td>
      <td class="message">
';
Exception handling for controllers using ActionController::Live

Any exceptions that occured at the view or controller level for a
controller using ActionController::Live would cause the server to either
hang with an open socket indefinitely, or immediately crash (depending
on whether the server was launched with rails s or directly). Changed
the behavior of exceptions to act the same as streaming templates for
html requests, and allow for an on_error callback if needed.
rails commands even if bin/rails is a gem stub
script/rails could never be from bundler
need to delete bin, not binstub, update wording
fix binstub typo
fix inverse_of association in block of new child

This fixes inconsistency when building children of association
which has inverse_of set properly.

When creating new association object with a block:

    parent.association.build do |child|
      child.parent.equal?(parent) # false
    end

So the block the `child.parent` did not point to the same object.
But when the object is created it points to same instance:

    child = parent.association.build
    child.parent.equal?(parent) # true
Refactor CollectionProxy#scope to avoid calling #extend.
Add block support for the  helper
apps that depend on active record should load fixtures
Revert "Warning removed unused variable task_name"

This reverts commit 106e15927f0dd8060fc37eff44b823a92fa94bd2.
Revert "Update Rake tasks to call `rails test` instead"

This reverts commit b51673fbd9563bd3ffa22e22255ca1cef80cfb6d.
ensure the schema checking is done in the dev connection
default task should also be in the test env
switch to Rails::TestTask
a test file can be provided to rake, e.g.:

  rake test path/to/test.rb
switch the testing tests to use rake
test no longer makes sense after requiring all test files
only match the default task