This reads a lot better, and we won't need to try start_with? for blank
delimiters.

Also rename method name to read better.

The conversion without area code already changed the passed number in
place, so change the other method to do the same.

Improve formatting of ActiveRecord migration exception messages

Fix offset with last.

We are generating safe strings in the paragraph, so we can escape the
tags

Closes #7441

* master-sec:
  Deep Munge the parameters for GET and POST
  Stop using i18n's built in HTML error handling.
  Ensure simple_format escapes its html attributes
  Escape the unit value provided to number_to_currency
  Only use valid mime type symbols as cache keys

Closes #13146.

This fixes an error when using:

```
change_colum :table, :column, :bigint, array: true
```

Added Date#all_week/month/quarter/year for generating date ranges

Add support for localized date references

fix email regex example code [ci skip]

different from the regex in EmailValidator

Ruby's Date class automatically gives us #yesterday, #today,
and #tomorrow. And ActiveSupport has a handy Time.zone.today
for getting a localized version. But there was no localized
version of #yesterday or #tomorrow. Until now.

Fix ActiveRecord::Callbacks sample code [ci skip]

Callback caller class uses `after_initialize`,
but Callback callee defines `after_find`.

Current sample code causes following error.

  NoMethodError: undefined method `after_initialize' for #<EncryptionWrapper:0x007fe4931fa5c0>

Fix QueryCache to work with nested blocks

This commit takes into account the last cache_enabled value, before clearing query_cache.

Introduce a context for rendering fixtures ERB.

Fixture files are passed through an ERB renderer before being read as
YAML. The rendering is currently done in the context of the main object,
so method definitons leak into other fixtures, and there is no clean
place to define fixture helpers.

After this commit, the ERB renderer will use a new subclass of
ActiveRecord::FixtureSet.context_class each time a fixture is rendered.

Conflicts:
	actionpack/CHANGELOG.md

This PR fixes #13064 regression bug introduced by the #8085

Now in _process_format when the format is a Mime::NullType nothing is written in self.content_type.
In this way the method Response#assign_default_content_type_and_charset can
write the the default mime_type.

Modify the Hash#assert_valid_keys error message so that it shows the valid keys. Also, show the wrong value as it was entered.

{ :failore => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
=> ArgumentError: Unknown key: failore
{ 'failore' => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
=> ArgumentError: Unknown key: failore

{ 'failore' => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
=> ArgumentError: Unknown key: "failore". Valid keys are: :failure, :funny

{ :failore => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
=> ArgumentError: Unknown key: :failore. Valid keys are: :failure, :funny

Conflicts:
	activerecord/CHANGELOG.md

Closes #11624.