WIP: Make ActionMailer tests order-independent.

rename var to fix overshadowing of variable

Follow-up to #14990 [ci skip]

Rewrite to avoid 'we'/'you', add missing period, and keep lines at 80 chars. Cheers :)

Improve readability with help from @senny

[ci skip]

[ci skip] Add feature section and normalize prologue with other guides.

Also change Json => JSON.

Fill Ruby's Range & IPAddr link.

o_O

fix guides mobile nav issue

Include label value in i18n attribute lookup

Ensure that .process return the method return

Previously, only the object and method name from the label tag were
used when looking up the translation for a label. If a value is
given for the label, this ought to be additionally used. The
following:

    # form.html.erb
    <%= form_for @post do |f| %>
      <%= f.label :type, value: "long" %>
    <% end %>

    # en.yml
    en:
      activerecord:
        attributes:
          post/long: "Long-form Post"

Used to simply return "long", but now it will return "Long-form
Post".

* Strips leading underscores.
* Changes some unnecessary gsub!s to sub!s.
* Replaces some anchors ^, $ with \A, \z.
* Documents that human inflection rules are applied.
* Documents that words are downcased except acronyms.
* Adds an example with an acronym.
* Rewords docs.

Refactored AssociationScope#get_bind_values

Moved 'params[request_forgery_protection_token]' into its own method and...

This will avoid directory traversal in implicit render.

Fixes: CVE-2014-0130

Conflicts:
	actionpack/lib/abstract_controller/base.rb

Fixed grammar [ci skip]

Fix Guide HTML validation

Fix rails dbconsole for jdbcmysql adapter

refactor and clean up delete_all method

Now that delete_all with destroy or delete_all dependency behave
the same we no longer need this conditional. This means we can remove
the new delete_all_with_dependency method I added and go straight
to delete_records from delete_all, passing :all and the dependent
directly.

Added #join_id_for(owner) to reflection to avoid accessing the source_macro

[ci skip]

Add support for module-level table_suffix in models

This makes table_name_suffix work the same as table_name_prefix when
using namespaced models. Pretty much the same as 67d1cec4.