[2.6] Remove possible call_user_func()
[ClassLoader] Fix undefined index in ClassCollectionLoader
Minor phpcs fixes
minor #12886 Minor phpcs fixes (acrobat)

This PR was merged into the 2.3 branch.

Discussion
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Minor phpcs fixes

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

Small phpcs fixes

Commits
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9a0d5c3 Minor phpcs fixes
[2.6] CS Fixes And Removed An Unused Import
minor #12872 [2.6] CS Fixes And Removed An Unused Import (GrahamCampbell)

This PR was squashed before being merged into the 2.6 branch (closes #12872).

Discussion
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[2.6] CS Fixes And Removed An Unused Import

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

##### This pull request fixes some cs issues in symfony 2.6.

This is the sequel to #12856.

Commits
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2f10a0a [2.6] CS Fixes And Removed An Unused Import
fix phpdoc's alignment
minor #12887 [2.3] CS Fixes: fix phpdoc's alignment (keradus)

This PR was merged into the 2.3 branch.

Discussion
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[2.3] CS Fixes: fix phpdoc's alignment

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

Fix phpdoc's alignment

Commits
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f588610 fix phpdoc's alignment
bug #12858 [ClassLoader] Fix undefined index in ClassCollectionLoader (szicsu)

This PR was merged into the 2.3 branch.

Discussion
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[ClassLoader] Fix undefined index in ClassCollectionLoader

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

Commits
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cfdb925 [ClassLoader] Fix undefined index in ClassCollectionLoader
[Console] fixes some typos and phpdoc.
Adding note about the PdoSessionHandler BC break
Adding note about known BC issues
minor #12884 [Console] fixes some typos and phpdoc. (hhamon)

This PR was merged into the 2.5 branch.

Discussion
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[Console] fixes some typos and phpdoc.

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

Commits
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86840df [Console] fixes some typos and phpdoc.
Added information when an error occured during validation of an answer of a question
bug #12806 [Console] Removed the use of $this->getHelperSet() as it is null by default (saro0h)

This PR was submitted for the 2.6 branch but it was merged into the 2.5 branch instead (closes #12806).

Discussion
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[Console] Removed the use of $this->getHelperSet() as it is null by default

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12805
| License       | MIT
| Doc PR        | ~

Before:
![capture d ecran 2014-12-02 a 15 51 38](https://cloud.githubusercontent.com/assets/667519/5264798/303bf87a-7a3e-11e4-9b45-68e8a86bab60.png)

After:
![capture d ecran 2014-12-02 a 16 36 25](https://cloud.githubusercontent.com/assets/667519/5265299/b13190d6-7a41-11e4-9e68-d889ea290cae.png)

Commits
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111b194 Added information when an error occured during validation of an answer of a question
minor #12890 Adding note about the PdoSessionHandler BC break (weaverryan)

This PR was merged into the 2.6 branch.

Discussion
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Adding note about the PdoSessionHandler BC break

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12833
| License       | MIT
| Doc PR        | symfony/symfony-docs#4609

Hi guys!

This adds an UPGRADE note about the PdoSessionHandler BC break in 2.6. I also added a section on top, which might be more controversial that highlights the BC breaks. That's because this document is long, and much of it is telling you about deprecated features. But what I first want to know is - what will break?

I'm also still interested in maybe adding the old PdoSessionHandler to 2.6 and allowing you to use that one to keep BC (still a BC break, but you could choose to use the old one).

Thanks!

Commits
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adfdad9 Adding note about known BC issues
42950e9 Adding note about the PdoSessionHandler BC break
Merge branch '2.3' into 2.5

* 2.3:
  fix phpdoc's alignment
  Minor phpcs fixes
  [ClassLoader] Fix undefined index in ClassCollectionLoader

Conflicts:
	src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
Merge branch '2.5' into 2.6

* 2.5:
  Added information when an error occured during validation of an answer of a question
  [Console] fixes some typos and phpdoc.
  fix phpdoc's alignment
  Minor phpcs fixes
  [ClassLoader] Fix undefined index in ClassCollectionLoader
Fixed typo in SecurityContext PHPDoc

Fixed typo in PHPDoc
minor #12895 [Security] Fixed typo in SecurityContext PHPDoc (althaus)

This PR was merged into the 2.6 branch.

Discussion
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[Security] Fixed typo in SecurityContext PHPDoc

Fixes a simple typo.

Commits
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8d7581a Fixed typo in SecurityContext PHPDoc