This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes#11464).Discussion----------[Translator] Use quote to surround invalid locale| Q             | A| ------------- | ---| Bug fix?      | no| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | -| License       | MIT| Doc PR        | -I got this message in one application (CLI):```  [InvalidArgumentException]  Invalid locale: en_US .```It's not so easy to spot the issue.Commits-------c9742ef [Translator] Use quote to surround invalid locale

…romainneutron)This PR was merged into the 2.3 branch.Discussion----------fix signal handling in wait() on calls to stop()| Q             | A| ------------- | ---| Bug fix?      | yes| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |#11286| License       | MIT| Doc PR        |``wait()`` throws an exception when the process was terminated by a signal. This should not happen when the termination was requested by calling the ``stop()`` method (for example, inside a callback which is passed to ``wait()``).Commits-------5939d34 [Process] Fix unit tests in sigchild environmenteb68662 [Process] fix signal handling in wait()94ffc4f bug#11469  [BrowserKit] Fixed server HTTP_HOST port uri conversion (bcremer, fabpot)103fd88 [BrowserKit] refactor code and fix unquoted regexf401ab9 Fixed server HTTP_HOST port uri conversion045cbc5 bug#11425 Fix issue described in#11421 (Ben, ben-rosio)f5bfa9b bug#11423 Pass a Scope instance instead of a scope name when cloning a container in the GrahpvizDumper (jakzal)3177be5 minor#11464 [Translator] Use quote to surround invalid locale (lyrixx)c9742ef [Translator] Use quote to surround invalid locale4dbe0e1 bug#11120 [2.3][Process] Reduce I/O load on Windows platform (romainneutron)797d814 bug#11342 [2.3][Form] Check if IntlDateFormatter constructor returned a valid object before using it (romainneutron)0b5348e minor#11441 [Translator] Optimize assertLocale regexp (Jérémy Derussé)537c39b Optimize assertLocale regexp4cf50e8 Bring code into standard9f4313c [Process] Add test to verify fix for issue#1142102eb765 [Process] Fixes issue#114216787669 [DependencyInjection] Pass a Scope instance instead of a scope name.9572918 bug#11411 [Validator] Backported#11410 to 2.3: Object initializers are called only once per object (webmozart)291cbf9 [Validator] Backported#11410 to 2.3: Object initializers are called only once per objectefab884 bug#11403 [Translator][FrameworkBundle] Added @ to the list of allowed chars in Translator (takeit)3176f8b [Translator][FrameworkBundle] Added @ to the list of allowed chars in Translator91e32f8 bug#11381 [2.3] [Process] Use correct test for empty string in UnixPipes (whs, romainneutron)45df2f3 minor#11397 [2.3][Process] Fix unit tests on Windows platform (romainneutron)cec0a45 [Process] Adjust PR#11264, make it Windows compatible and fix CSd418935 [Process] Fix unit tests on Windows platformff0bb01 [Process] Reduce I/O load on Windows platformace5a29 bumped Symfony version to 2.3.1975e07e6 updated VERSION for 2.3.184a12f4d update CONTRIBUTORS for 2.3.1898b891d updated CHANGELOG for 2.3.1806a80fb Validate locales sets intos translator06fc97e feature#11367 [HttpFoundation] Fix to prevent magic bytes injection in JSONP responses... (CVE-2014-4671) (Andrew Moore)3c54659 minor#11387 [2.3] [Validator] Fix UserPassword validator translation (redstar504)73d50ed Fix UserPassword validator translation93a970c bug#11386 Remove Spaceless Blocks from Twig Form Templates (chrisguitarguy)8f9ed3e Remove Spaceless Blocks from Twig Form Templates9e1ea4a [Process] Use correct test for empty string in UnixPipes6af3d05 [HttpFoundation] Fix to prevent magic bytes injection in JSONP responses (PreventsCVE-2014-4671)ebf967d [Form] Check if IntlDateFormatter constructor returned a valid object before using it