* 2.7:
Remove some unused variables, properties and methods
[ExpressionLanguage] Fix parse error on 5.3
[HttpKernel] remove noisy frame in controller stack traces
[ExpressionLanguage] throw an SyntaxError instead of letting a undefined index notice
Fix php doc in Table class
bumped Symfony version to 2.7.40
updated VERSION for 2.7.39
update CONTRIBUTORS for 2.7.39
updated CHANGELOG for 2.7.39
* 2.7:
[Validator] added magic method __isset() to File Constraint class
[DI] Fix possible incorrect php-code when dumped strings contains newlines
[Translation] minor: remove unused variable in test
never match invalid IP addresses
* 2.7:
Fix 7.2 compat layer
Fix PHP 7.2 support
[HttpFoundation] Add missing session.lazy_write config option
[HttpFoundation] Combine Cache-Control headers
[Form] fix parsing invalid floating point numbers
Escape command usage when displaying it in the text descriptor
Use for=ID on radio/checkbox label.
* 2.7: (22 commits)
Tests and fix for issue in array model data in EntityType field with multiple=true
[Form] Fixed PercentToLocalizedStringTransformer to accept both comma and dot as decimal separator, if possible
removed useless PHPDoc
[Form] Fix FormInterface::submit() annotation
PdoSessionHandler: fix advisory lock for pgsql when session.sid_bits_per_character > 4
HttpCache does not consider ESI resources in HEAD requests
Fix translation for "This field was not expected"
[Routing] Enhance Route(Collection) docblocks
Added improvement for accuracy in MoneyToLocalizedStringTransformer.
Removed unused private property
Use correct verb form in the pull request template
Use PHP_MAXPATHLEN in Filesystem.
Added null as explicit return type (?TokenInterface)
[FrameworkBundle] Fix Routing\DelegatingLoader
Render all line breaks according to the exception message
[Form] Fix phpdoc
[DI] remove confusing code
[Form] Fixed GroupSequence with "constraints" option
[Validator] Clarify UUID validator behavior
[Filesystem] Fixed makePathRelative
...
* 2.7:
[DI] Remove unused props from the PhpDumper
[ProxyManager] Cleanup fixtures
[Debug] HTML-escape array key
Add some phpdocs for IDE autocompletion and better SCA
* 2.7:
[DI] use assertStringEqualsFile when possible
[VarDumper] Adapt to php 7.2 changes
[Form][TwigBridge] Don't render _method in form_rest() for a child form
[Validator] Fix IbanValidator for ukrainian IBANs
