[PropertyAccess] Added test to verify #5775 is fixed
[FrameworkBundle] fix cache:clear command
CS: There should be no empty lines following phpdocs
minor #13011 CS: There should be no empty lines following phpdocs (keradus)

This PR was merged into the 2.3 branch.

Discussion
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CS: There should be no empty lines following phpdocs

Commits
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143f900 CS: There should be no empty lines following phpdocs
add a limit and a test to FlattenExceptionTest.
bug #13004 add a limit and a test to FlattenExceptionTest. (Daniel Wehner)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #13004).

Discussion
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add a limit and a test to FlattenExceptionTest.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #13003
| License       | MIT
| Doc PR        |

Commits
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c6bcf05 add a limit and a test to FlattenExceptionTest.
bug #12999 [FrameworkBundle] fix cache:clear command (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
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[FrameworkBundle] fix cache:clear command

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12893
| License       | MIT
| Doc PR        | -

Reading comment on #12893 stating that using absolute paths works around the pb, I tried using realpath(),
and it works!
Pending work on #12955 can be done quietly now.

Commits
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a14153a [FrameworkBundle] fix cache:clear command
fixed CS
BinaryFileResponse - add missing newline
minor #13024 CS: BinaryFileResponse - add missing newline (keradus)

This PR was merged into the 2.3 branch.

Discussion
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CS: BinaryFileResponse - add missing newline

Commits
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9bbf803 BinaryFileResponse - add missing newline
[Tests] Silenced all deprecations in tests for 2.3
Very minor grammar fix in error message
update required minimum TwigBridge version

To be able to use `Twig_SimpleFunction` in `AssetsExtension`, Twig has
to be present in version 1.12 or higher. The TwigBridge only enforces
this Twig version as of version 2.3.10.
minor #13030 [TwigBundle] update required minimum TwigBridge version (xabbuh)

This PR was submitted for the 2.7 branch but it was merged into the 2.3 branch instead (closes #13030).

Discussion
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[TwigBundle] update required minimum TwigBridge version

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

To be able to use `Twig_SimpleFunction` in `AssetsExtension`, Twig has
to be present in version 1.12 or higher. The TwigBridge only enforces
this Twig version as of version 2.3.10.

Commits
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cb351a6 update required minimum TwigBridge version
[Security] Delete old session on auth strategy migrate
minor #13033 [Tests] Silenced all deprecations in tests for 2.3 (saro0h)

This PR was merged into the 2.3 branch.

Discussion
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[Tests] Silenced all deprecations in tests for 2.3

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

Also removed src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php as it was not running at all.

Commits
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ef4ae63 [Tests] Silenced all deprecations in tests for 2.3
minor #13036 [Config] Very minor grammar fix in error message (WouterJ)

This PR was merged into the 2.3 branch.

Discussion
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[Config] Very minor grammar fix in error message

It's just a tiny detail, but I found it important enough to submit a fix.

| Q   | A
| --- | ---
| License | MIT
| Fixed tickets | -

Commits
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1c65f36 Very minor grammar fix in error message
fixed CS
bug #13048 [Security] Delete old session on auth strategy migrate (xelaris)

This PR was merged into the 2.3 branch.

Discussion
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[Security] Delete old session on auth strategy migrate

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #13026
| License       | MIT
| Doc PR        |

As identified by @austinh in #13026 there are two sessions after authentication, since the previous session is migrated to a new one by ``session_regenerate_id``. This PR ensures the old session is been deleted immediately on migration.
I can't see any drawbacks, but if the change would break BC, another approach would be to add a new strategy like ``switch`` to enable instant deletion of the old session.

Commits
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5dd11e6 [Security] Delete old session on auth strategy migrate
[Config] fixes broken unit test on ArrayNode class.