Merge pull request #10925 from senny/10917_test_to_prevent_regression

regression test + mysql2 adapter raises correct error if conn is closed.
Merge pull request #10955 from arunagw/jruby_json_not_required

'json' gem is no more required under JRuby
Merge pull request #151 from vatrai/action_view_basic

date_field docs for action view
Merge pull request #146 from vatrai/command_line_rake_guid

more guidelines for rake tasks
Merge pull request #150 from vatrai/edgerails_in_command_line

replace version 3.2.3 by 4.0.0.beta in command line
fixture setup does not rely on `AR::Base.configurations`.

As you can also configure your database connection using `ENV["DATABASE_URL"]`,
the fixture setup can't reply on the `.configurations` Hash.

As the fixtures are only loaded when ActiveRecord is actually used
(`rails/test_help.rb`) it should be safe to drop the check for an existing configuration.
Merge pull request #10907 from senny/fixtures_and_database_url

fixture setup does not rely on `AR::Base.configurations`.
Make test name descriptive and add reference to original regression commit
Change documentation about contributing to Docs
Merge pull request #10533 from vipulnsward/fix_test

Fix test, addresss => address
Update contributing to rails guide to depict new contributing to documentation info
Merge pull request #10949 from alexpeattie/update_html_boolean_attrs

Update HTML boolean attributes per the HTML 5.1 spec
reword the docrails info [ci skip]
Use markdown quotes instead <tt> tag
fix quotes and ruby old hashes
Updated the doc for const_regexp [ci skip]
Merge pull request #10954 from arunagw/update_docs_for_const_regexp

Updated the doc for const_regexp [ci skip]
Merge pull request #10727 from pacoguzman/fix-xml-mini-tests

Fix XmlMini different backends tests
reorder finder methods list alphabetically
Use xml instead already parsed xml