use GitHub instead of Github
Fixed bad indenting (the list was treated as a blockquote)
minor #4004 use GitHub instead of Github (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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use GitHub instead of Github

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

60015e6 use GitHub instead of Github
added CVE 2014-4931
quote YAML strings starting with % or @ characters

Pygment uses the YAML 1.1 standard to parse YAML code being highlighted.
A string value cannot start with the percent sign or the @ character
in YAML 1.1 without being quoted. To highlight the YAML code blocks
properly, strings starting with the percent sign are now enclosed in
double quotes.
remove "..." from XML element tags

The ellipses were used as placeholders in XML element tags. Thus, the
XML wasn't well-formed and therefore would have never been rendered
properly.
Update version in Rework your Patch section
link to the deployment index
apply headline guidelines to the cookbook articles
Added editorconfig
Fixed a minor syntax error
Also apply it for .rst.inc files
Remove "Controllers extends ContainerAware" best practice
feature #4009 Remove "Controllers extends ContainerAware" best practice (tgalopin)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #4009).

Discussion
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Remove "Controllers extends ContainerAware" best practice

As discussed in https://github.com/symfony/symfony-docs/issues/4008, I remove the best practice consisting of extending ContainerAware instead of base Controller class to improve DX.

Commits
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992033f Remove "Controllers extends ContainerAware" best practice
minor #4015 Fixed bad indenting (the list was treated as a blockquote) (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
----------

Fixed bad indenting (the list was treated as a blockquote)

Commits
-------

d0c2880 Fixed bad indenting (the list was treated as a blockquote)
Update twig_reference.rst

Fix typo
minor #4019 Update twig_reference.rst (redstar504)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #4019).

Discussion
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Update twig_reference.rst

Fix typo

Commits
-------

bd40720 Update twig_reference.rst
minor #4035 Update version in Rework your Patch section (yguedidi)

This PR was merged into the 2.3 branch.

Discussion
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Update version in Rework your Patch section

Commits
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7b2f9b4 Update version in Rework your Patch section
fix parent form types

The parent type of both the email type and the textarea type is not
the form type but instead the text type.
Update internals.rst

The proper idiom is "behind the scenes".

I also fixed the sentence structure.