[Console] Make sure formatter is the same

The parent constructor will create a new formatter if the $formatter parameter is null
This fix avoids that the formatter becomes 2 different instances in $this and $this->stderr
bug #11272 [Console] Make sure formatter is the same. (akimsko)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #11272).

Discussion
----------

[Console] Make sure formatter is the same.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |
The parent constructor will create a new formatter if the $formatter parameter is null.

This fix avoids that the formatter becomes 2 different instances in $this and $this->stderr, if null was passed to the constructor.

Commits
-------

64328d9 [Console] Make sure formatter is the same
Simplified the Travis test command

There is no reason to turn a failure into a different failure. And this
will avoid Travis to say that the "false" command failed.
[DomCrawler] Remove the query string and the anchor of the uri of a link
bug #11194 [DomCrawler] Remove the query string and the anchor of the uri of a link (benja-M-1)

This PR was squashed before being merged into the 2.3 branch (closes #11194).

Discussion
----------

[DomCrawler] Remove the query string and the anchor of the uri of a link

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

Commits
-------

fe5d2d1 [DomCrawler] Remove the query string and the anchor of the uri of a link
[DomCrawler] Fix docblocks and formatting.
minor #11288 [DomCrawler] Fix Link docblocks and formatting (jakzal)

This PR was merged into the 2.3 branch.

Discussion
----------

[DomCrawler] Fix Link docblocks and formatting

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

re #11194

Commits
-------

5cbe13e [DomCrawler] Fix docblocks and formatting.
updated italian translation for validation messages
minor #11246 [Validator] updated italian translations  (micheleorselli)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11246).

Discussion
----------

[Validator] updated italian translations

Commits
-------

b74afe0 updated italian translation for validation messages
[Translation] Added unescaping of ids in PoFileLoader
bug #11238 [Translation] Added unescaping of ids in PoFileLoader (JustBlackBird)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #11238).

Discussion
----------

[Translation] Added unescaping of ids in PoFileLoader

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Although it is not directly described in gettext docs, _msgid_ should be unescaped too. The other reason to unescape _msgid_ is symmetry between ```PoFileLoader``` and ```PoFileDumper```. The dumper escapes both _msgid_ and _msgstr_ values, but the loader unescapes only _msgstr_.

Commits
-------

816a4a9 [Translation] Added unescaping of ids in PoFileLoader
minor #11285 Simplified the Travis test command (stof)

This PR was merged into the 2.3 branch.

Discussion
----------

Simplified the Travis test command

There is no reason to turn a failure into a different failure. And this will avoid Travis to say that the "false" command failed.

Commits
-------

e8d01c9 Simplified the Travis test command
bug #11319 [HttpKernel] Ensure the storage exists before purging it in ProfilerTest
minor #11321 [HttpKernel] Ensure the storage exists before purging it in ProfilerTest (penyaskito)

This PR was merged into the 2.3 branch.

Discussion
----------

[HttpKernel] Ensure the storage exists before purging it in ProfilerTest

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11319
| License       | MIT
| Doc PR        | None

Commits
-------

eb63270 bug #11319 [HttpKernel] Ensure the storage exists before purging it in ProfilerTest
added XSD to PHPUnit configuration
minor #11329 add XSD to PHPUnit configuration (craue)

This PR was merged into the 2.3 branch.

Discussion
----------

add XSD to PHPUnit configuration

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | --
| License       | MIT
| Doc PR        | --

The syntax check functionality has been removed in PHPUnit 3.6 already. But there's no Composer constraint for PHPUnit, so you can never know which version will actually be used to run tests. Let me know what you think.

Commits
-------

84b5581 added XSD to PHPUnit configuration
updated CHANGELOG for 2.3.17
update CONTRIBUTORS for 2.3.17
updated VERSION for 2.3.17
bumped Symfony version to 2.3.18