Add configuration option to optionally disable deep_munge
Fix indent in PG array tests

[ci skip]
fix default select when from is used
Make `rails runner` command options more obvious


We're surrounding the options in angle brackets `<>` as is convention in `curl`:

```
$ curl --help
Usage: curl [options...] <url>
```

And then in square brackets `[]` with bars `|` as in `tar`:

```
$ tar --help
...
Create: tar -c [options] [<file> | <dir> | @<archive> | -C <dir> ]
```

To further clarify that the command can be used with both, we now show examples:

```
Examples:
    rails runner 'puts Rails.env'
        This runs the code `puts Rails.env` after loading the app

    rails runner path/to/filename.rb
        This runs the Ruby file located at `path/to/filename.rb` after loading the app
```

This format was taken from the `find` man pages:

```
EXAMPLES
     The following examples are shown as given to the shell:

     find / \! -name "*.c" -print
             Print out a list of all the files whose names do not end in .c.

     find / -newer ttt -user wnj -print
             Print out a list of all the files owned by user ``wnj'' that are newer than the file ttt.
```

The the text at the bottom is also shifted to improve readability.
Merge pull request #13344 from ccutrer/fix-from-default-select

fix default select when from is used
quoting: Check if id is a valid method before using it

Need to check if valud also respond_to :id before calling it, otherwise
things could explode.
Improve CHANGELOG entry [ci skip]
[ci skip] Describe precision + scale in migrations

Telling somebody that "precision sets the precision" is not very helpful.
Newbies want to know what precision is *for*, likewise with scale.

So I've added a very brief description for each.
Merge pull request #13411 from schneems/schneems/runner-command-dash-c

Make `rails runner` command options more obvious
Merge pull request #13412 from arthurnn/quote_id_not_id

quoting: Check if id is a valid method before using it
Merge pull request #13357 from taryneast/master

Describe precision + scale in migrations guide
Flag `config.assets.raise_runtime_errors` in dev

By default `config.assets.raise_runtime_errors` should be set to `true` in development for new apps.

Source: https://github.com/rails/sprockets-rails/pull/100
Merge pull request #13326 from schneems/schneems/add-asset-flag

Flag `config.assets.raise_runtime_errors` in dev
change CollectionAssociation's comments to say Association instead of AssociationProxy to match changes for 3.1 removing Association proxy.
Do not expect database user with app name to exist

By default when creating a project with `--database=postgresql` the `config/database.yml` file that is generated has a user specified that is the same as the app name

```
development:
  adapter: postgresql
  encoding: unicode
  database: <%= app_name %>_development
  pool: 5
  username: <%= app_name %>
  password:
```

This is counterintuitive and would rarely be valid. By default postgres creates a user with the current user name (http://www.postgresql.org/docs/9.3/static/database-roles.html) "it will have the same name as the operating system user that initialized the database cluster":

```
$ whoami
schneems
```

If the `username` is left out postgresql will assume that you wish to log in as the default user

```
$ psql -c '\du'
                             List of roles
 Role name |                   Attributes                   | Member of
-----------+------------------------------------------------+-----------
 schneems  | Superuser, Create role, Create DB, Replication | {}
```

A good sensible default then for auto generated `database.yml` files is to remove the `username`, and have postgres attempt to connect to the database as the currently logged in user.

Instead of submitting with a blank password, don't submit a password.
Merge pull request #13417 from TalkativeTree/comments_change

fix CollectionAssociation's comments
Use sass-rails 4.0.1
Merge pull request #13418 from ma2gedev/update_sass_rails_4_0_0

Use sass-rails 4.0.0
Merge pull request #13188 from imanel/skip_deep_munge

Add configuration option to optionally disable deep_munge

Conflicts:
	actionpack/CHANGELOG.md
Fix AS::NumberHelper results with large precisions

before:
  ActiveSupport::NumberHelper.number_to_rounded '3.14159', precision: 50
  => "3.14158999999999988261834005243144929409027099609375"
after:
  ActiveSupport::NumberHelper.number_to_rounded '3.14159', precision: 50
  => "3.14159000000000000000000000000000000000000000000000"