Each chunk of text coming after `render` is now handled individually as a possible list of arguments.

The current implementation can't handle some special cases of oddly-formatted Ruby. Now we are able to detect them:

* Multi-line arguments on the `render` call
* Strings containing quotes, e.g. `"something's wrong"`
* Multiple kinds of identifiers - instance variables, class variables and globals
* Method chains as arguments for the `render` call

Also, this fix reduces the rate of "false positives" which showed up when we had calls/access to identifiers containing `render`, like `surrender` and `rendering`.

This reverts commit 026d0555.

Conflicts:
	activerecord/lib/active_record/fixtures.rb

Fixes #13383

Adding Hash#compact and Hash#compact! methods

  * Adding Hash#compact and Hash#compact! methods
  * Using Ruby 1.9 syntax on documentation
  * Updating guides for `Hash#compact` and `Hash#compact!` methods
  * Updating CHANGELOG for ActiveSupport
  * Removing unecessary protected method and lambda for `Hash#compact` implementations
  * Performing `Hash#compact` implementation - https://gist.github.com/tinogomes/8332883
  * fixing order position
  * Fixing typo

MySQL version 4.1 was EOL on December 31, 2009 [ci-skip]

We should at least recommend modern versions of MySQL to users.

fixes #13547

The body may use the local cache during rendering.  `call`ing the app
doesn't mean that rendering is finished, so we need to wait until
`close` is called on the body.

Move finish_template as the last public method defined in the generator

Fix typo [ci skip]

Closes #13623.

Be more explicit about the default of db:drop and db:create

Closes #13625

This reverts commit 2ef1fb2c.

As described in PR #13627 this commit broke functionality when passing
a negative Fixnum to the `String#to` method:

```ruby
assert_equal "hell", s.to(-2)
```

Before the revert, this failed with:

```
  1) Failure:
StringAccessTest#test_#to_with_negative_Fixnum,_position_is_counted_from_the_end [test/core_ext/string_ext_test.rb:275]:
Expected: "hell"
  Actual: nil
```

This revert is to keep the functionality on `master` working.
If there is another way to get the performance benefit and keep
the documented functionality we can add that.

/cc @amatsuda @carlosantoniodasilva

I also extracted the tests from a single bulk method into a separate test-case.
The new tests cover the API described in the docs.

There are two skipped tests, which are broken as of 2ef1fb2c
* #to with negative Fixnum, position is counted from the end
* #from and #to can be combined

This was brought to my attention by #13627.

Closes #13627.

activerecord: Initialize Migration with version from MigrationProxy.

Conflicts:
	activerecord/CHANGELOG.md

Fix typo in image_tag documentation [ci skip]

image_tag only supports :alt and :size as additional keys, not three.

Make change_table use object of current database adapter

  - Earlier, change_table was creating database-agnostic object.
  - After this change, it will create correct object based on current
    database adapter.
  - This will ensure that create_table and change_table will get same objects.
  - This makes update_table_definition method public and nodoc.
  - Fixes #13577 and #13503

Also improve changelog entries related to secure password to proper
highlight.

Add 'e' var on rescue DalliError, in order to log it

Remove warnings in test suite

lib/active_record/store.rb:79: warning: method redefined; discarding old color=
lib/active_record/store.rb:79: warning: previous definition of color= was here
lib/active_record/store.rb:83: warning: method redefined; discarding old color
lib/active_record/store.rb:83: warning: previous definition of color was here

Fix: ActiveRecord::Store TypeError conversion when using YAML coder

Renaming the test accordingly to its behaviour

Adding 'Fixes' statement to changelog

Improving tests legibility & changelog

Undoing mistakenly removed empty line & further improving changelog

/cc @pixeltrix

Wrapping symbols with + does not work, we must use <tt> instead.