Fix typo.
add missing 's' for plural.
added a note about types we support
Update standards.rst

Added space line after if statement
[Contributing] consistent headlines
[Components] consistent headlines
fix the wording in versionadded directives
Added April changelog
[#3797] Reordered changelog
minor #3801 [Cookbook][Form] Fixed Typo & missing word. (ahsio)

This PR was merged into the 2.3 branch.

Discussion
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[Cookbook][Form] Fixed Typo & missing word.

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all (or 2.3+)
| Fixed tickets |

Commits
-------

cc0846b add missing 's' for plural.
b140a70 Fix typo.
Merge remote-tracking branch 'origin/2.3' into 2.3
minor #3802 Add a note about which types can be used in Symfony (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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Add a note about which types can be used in Symfony

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | no
| Applies to    | all
| Fixed tickets | n/a

see symfony/symfony#10701

Commits
-------

bf9d509 added a note about types we support
Update csrf_in_login_form.rst

We want to protect against CSRF, not allow it. :)
minor #3819 Update csrf_in_login_form.rst (micheal)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3819).

Discussion
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Update csrf_in_login_form.rst

We want to protect against CSRF, not allow it. :)

Commits
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8d80e22 Update csrf_in_login_form.rst
Update page_creation.rst

Apache's directory index documentation link outdated - replaced <2.0> in the link with <2.4>
Update page_creation.rst
minor #3820 Update page_creation.rst (adreeun)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3820).

Discussion
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Update page_creation.rst

Apache's directory index documentation link outdated - replaced <2.0> in the link with <2.4>

Commits
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32508f2 Update page_creation.rst
e0cb998 Update page_creation.rst
Update custom_authentication_provider.rst

improved description of the getKey method
minor #3821 Update custom_authentication_provider.rst (leberknecht)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3821).

Discussion
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Update custom_authentication_provider.rst

improved description of the getKey method

Commits
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89c2d88 Update custom_authentication_provider.rst
Update voters_data_permission.rst

remove ContainerInterface